diff --git a/src/Id/Billable.php b/src/Id/Billable.php
index 3c946e7..7e5618b 100644
--- a/src/Id/Billable.php
+++ b/src/Id/Billable.php
@@ -13,10 +13,9 @@ use Anikeen\Id\Concerns\ManagesProfile;
 use Anikeen\Id\Concerns\ManagesSubscriptions;
 use Anikeen\Id\Concerns\ManagesTaxation;
 use Anikeen\Id\Concerns\ManagesTransactions;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Helpers\Paginator;
-use GuzzleHttp\Exception\GuzzleException;
 use stdClass;
+use Throwable;
 
 trait Billable
 {
@@ -32,27 +31,23 @@ trait Billable
     use ManagesTransactions;
     use Request;
 
-    protected stdClass|null $userData = null;
-
     /**
      * Get the currently authenticated user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function getUserData(): stdClass
     {
-        if (!$this->userData) {
-            $this->userData = $this->request('GET', 'v1/user')->data;
+        if (!isset($this->userDataCache)) {
+            $this->userDataCache = $this->request('GET', 'v1/user')->data;
         }
-        return $this->userData;
+        return $this->userDataCache;
     }
 
     /**
      * Make a request to the Anikeen API.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function request(string $method, string $path, null|array $payload = null, array $parameters = [], ?Paginator $paginator = null): Result
     {
diff --git a/src/Id/Concerns/MagicProperties.php b/src/Id/Concerns/MagicProperties.php
deleted file mode 100644
index 0e6ba26..0000000
--- a/src/Id/Concerns/MagicProperties.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-namespace Anikeen\Id\Concerns;
-
-use stdClass;
-
-trait MagicProperties
-{
-    protected function setMagicProperties(stdClass|array $data): void
-    {
-        foreach ((object)$data as $key => $value) {
-            if (!property_exists($this, $key)) {
-                $this->{$key} = $value;
-            }
-        }
-    }
-
-    /**
-     * Magic getter: return null for undefined properties
-     *
-     * @param string $name
-     * @return mixed|null
-     */
-    public function __get(string $name)
-    {
-        return null;
-    }
-
-    /**
-     * Magic isset: return false for undefined properties
-     *
-     * @param string $name
-     * @return bool
-     */
-    public function __isset(string $name): bool
-    {
-        return false;
-    }
-}
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesAddresses.php b/src/Id/Concerns/ManagesAddresses.php
index ef7596c..63a1f05 100644
--- a/src/Id/Concerns/ManagesAddresses.php
+++ b/src/Id/Concerns/ManagesAddresses.php
@@ -5,7 +5,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Addresses;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesAddresses
 {
@@ -14,21 +14,23 @@ trait ManagesAddresses
     /**
      * Get addresses from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function addresses(): Addresses
     {
-        return (new Addresses($this->request('GET', 'v1/addresses')))
-            ->setBillable($this);
+        if (!isset($this->addressesCache)) {
+            $this->addressesCache = Addresses::builder(fn() => $this->request('GET', 'v1/addresses'))
+                ->setBillable($this);
+        }
+
+        return $this->addressesCache;
     }
 
     /**
      * Check if the current user has a default billing address.
      *
      * @see \Anikeen\Id\Resources\Addresses::hasDefaultBillingAddress()
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function hasDefaultBillingAddress(): bool
     {
diff --git a/src/Id/Concerns/ManagesBalance.php b/src/Id/Concerns/ManagesBalance.php
index 0c2150e..b80028c 100644
--- a/src/Id/Concerns/ManagesBalance.php
+++ b/src/Id/Concerns/ManagesBalance.php
@@ -3,10 +3,8 @@
 namespace Anikeen\Id\Concerns;
 
 use Anikeen\Id\ApiOperations\Request;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Transaction;
-use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesBalance
 {
@@ -15,8 +13,7 @@ trait ManagesBalance
     /**
      * Get balance from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function balance(): float
     {
@@ -26,8 +23,7 @@ trait ManagesBalance
     /**
      * Get charges from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function charges(): float
     {
@@ -40,12 +36,11 @@ trait ManagesBalance
      * @param float $amount Amount to charge in euros.
      * @param string $paymentMethodId Payment method ID.
      * @param array $options Additional options for the charge.
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function charge(float $amount, string $paymentMethodId, array $options = []): Transaction
     {
-        return new Transaction($this->request('POST', 'billing/charge', [
+        return new Transaction(fn() => $this->request('POST', 'billing/charge', [
             'amount' => $amount,
             'payment_method_id' => $paymentMethodId,
             'options' => $options,
diff --git a/src/Id/Concerns/ManagesCountries.php b/src/Id/Concerns/ManagesCountries.php
index 5792980..1fe32f8 100644
--- a/src/Id/Concerns/ManagesCountries.php
+++ b/src/Id/Concerns/ManagesCountries.php
@@ -5,7 +5,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Countries;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesCountries
 {
@@ -14,12 +14,15 @@ trait ManagesCountries
     /**
      * Get available countries for the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function countries(): Countries
     {
-        return (new Countries($this->request('GET', 'v1/countries')))
-            ->setBillable($this);
+        if (!isset($this->countriesCache)) {
+            $this->countriesCache = Countries::builder(fn() => $this->request('GET', 'v1/countries'))
+                ->setBillable($this);
+        }
+
+        return $this->countriesCache;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesInvoices.php b/src/Id/Concerns/ManagesInvoices.php
index 212fc85..0664c87 100644
--- a/src/Id/Concerns/ManagesInvoices.php
+++ b/src/Id/Concerns/ManagesInvoices.php
@@ -5,7 +5,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Invoices;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesInvoices
 {
@@ -14,12 +14,15 @@ trait ManagesInvoices
     /**
      * Get invoices from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function invoices(array $parameters = []): Invoices
     {
-        return (new Invoices($this->request('GET', 'v1/invoices', [], $parameters)))
-            ->setBillable($this);
+        if (!isset($this->invoicesCache)) {
+            $this->invoicesCache = Invoices::builder(fn() => $this->request('GET', 'v1/invoices', [], $parameters))
+                ->setBillable($this);
+        }
+
+        return $this->invoicesCache;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesOrders.php b/src/Id/Concerns/ManagesOrders.php
index c86548a..37fdc6e 100644
--- a/src/Id/Concerns/ManagesOrders.php
+++ b/src/Id/Concerns/ManagesOrders.php
@@ -6,7 +6,7 @@ use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Orders;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesOrders
 {
@@ -15,12 +15,15 @@ trait ManagesOrders
     /**
      * Get orders from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function orders(array $parameters = []): Orders
     {
-        return (new Orders($this->request('GET', 'v1/orders', [], $parameters)))
-            ->setBillable($this);
+        if (!isset($this->ordersCache)) {
+            $this->ordersCache = Orders::builder(fn() => $this->request('GET', 'v1/orders', [], $parameters))
+                ->setBillable($this);
+        }
+
+        return $this->ordersCache;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesPaymentMethods.php b/src/Id/Concerns/ManagesPaymentMethods.php
index 7710d86..847f2cf 100644
--- a/src/Id/Concerns/ManagesPaymentMethods.php
+++ b/src/Id/Concerns/ManagesPaymentMethods.php
@@ -7,7 +7,7 @@ use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\PaymentMethod;
 use Anikeen\Id\Resources\PaymentMethods;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesPaymentMethods
 {
@@ -16,21 +16,24 @@ trait ManagesPaymentMethods
     /**
      * Get payment methods from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function paymentMethods(): PaymentMethods
     {
-        return (new PaymentMethods($this->request('GET', 'v1/payment-methods')))
-            ->setBillable($this);
+        if (!isset($this->paymentMethodsCache)) {;
+            $this->paymentMethodsCache = PaymentMethods::builder(
+                fn() => $this->request('GET', 'v1/payment-methods')
+            )->setBillable($this);
+        }
+
+        return $this->paymentMethodsCache;
     }
 
     /**
      * Check if current user has at least one payment method.
      *
      * @see \Anikeen\Id\Resources\PaymentMethods::hasPaymentMethod()
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function hasPaymentMethod(): ?PaymentMethod
     {
@@ -41,8 +44,7 @@ trait ManagesPaymentMethods
      * Get default payment method from the current user.
      *
      * @see \Anikeen\Id\Resources\PaymentMethods::defaultPaymentMethod()
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function defaultPaymentMethod(): ?PaymentMethod
     {
@@ -53,8 +55,7 @@ trait ManagesPaymentMethods
      * Check if the current user has a default payment method.
      *
      * @see \Anikeen\Id\Resources\PaymentMethods::hasDefaultPaymentMethod()
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function hasDefaultPaymentMethod(): bool
     {
@@ -66,8 +67,7 @@ trait ManagesPaymentMethods
      *
      * @param string|null $returnUrl The URL to redirect to after the user has finished in the billing portal.
      * @param array $options Additional options for the billing portal.
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function billingPortalUrl(?string $returnUrl = null, array $options = []): string
     {
@@ -81,8 +81,7 @@ trait ManagesPaymentMethods
      * Create a new setup intent.
      *
      * @param array $options Additional options for the setup intent.
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function createSetupIntent(array $options = []): Result
     {
diff --git a/src/Id/Concerns/ManagesPricing.php b/src/Id/Concerns/ManagesPricing.php
index 4890d49..6e92097 100644
--- a/src/Id/Concerns/ManagesPricing.php
+++ b/src/Id/Concerns/ManagesPricing.php
@@ -5,7 +5,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Post;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesPricing
 {
@@ -29,8 +29,7 @@ trait ManagesPricing
      * } $attributes The order data:
      *   - country_iso:     ISO 3166-1 alpha-2 country code
      *   - items:           Array of order items (each with type, name, price, unit, units, and quantity)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function createOrderPreview(array $attributes = []): Result
     {
diff --git a/src/Id/Concerns/ManagesProfile.php b/src/Id/Concerns/ManagesProfile.php
index 4dd174a..f331ab8 100644
--- a/src/Id/Concerns/ManagesProfile.php
+++ b/src/Id/Concerns/ManagesProfile.php
@@ -5,7 +5,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesProfile
 {
@@ -17,8 +17,7 @@ trait ManagesProfile
      * @param string|null $returnUrl The URL to redirect to after the user has completed their profile.
      * @param array $options Additional options for the profile URL.
      * @return string
-     * @throws GuzzleException
-     * @throws RequestRequiresClientIdException
+     * @throws Throwable
      */
     public function profilePortalUrl(?string $returnUrl = null, array $options = []): string
     {
diff --git a/src/Id/Concerns/ManagesSshKeys.php b/src/Id/Concerns/ManagesSshKeys.php
index 0435e2c..17994cb 100644
--- a/src/Id/Concerns/ManagesSshKeys.php
+++ b/src/Id/Concerns/ManagesSshKeys.php
@@ -6,7 +6,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Get;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\SshKeys;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesSshKeys
 {
@@ -15,12 +15,15 @@ trait ManagesSshKeys
     /**
      * Get currently authed user with Bearer Token.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function sshKeysByUserId(string $sskKeyId): SshKeys
     {
-        return (new SshKeys($this->get(sprintf('v1/users/%s/ssh-keys/json', $sskKeyId))))
-            ->setParent($this);
+        if (!isset($this->sshKeysCache)) {
+            $this->sshKeysCache = SshKeys::builder(fn() => $this->get(sprintf('v1/users/%s/ssh-keys/json', $sskKeyId)))
+                ->setParent($this);
+        }
+
+        return $this->sshKeysCache;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesSubscriptions.php b/src/Id/Concerns/ManagesSubscriptions.php
index b86d2bf..b6dc837 100644
--- a/src/Id/Concerns/ManagesSubscriptions.php
+++ b/src/Id/Concerns/ManagesSubscriptions.php
@@ -5,7 +5,7 @@ namespace Anikeen\Id\Concerns;
 use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Subscriptions;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesSubscriptions
 {
@@ -14,12 +14,15 @@ trait ManagesSubscriptions
     /**
      * Get subscriptions from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function subscriptions(): Subscriptions
     {
-        return (new Subscriptions($this->request('GET', 'v1/subscriptions')))
-            ->setBillable($this);
+        if (!isset($this->subscriptionsCache)) {
+            $this->subscriptionsCache = Subscriptions::builder(fn() => $this->request('GET', 'v1/subscriptions'))
+                ->setBillable($this);
+        }
+
+        return $this->subscriptionsCache;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesTaxation.php b/src/Id/Concerns/ManagesTaxation.php
index 4abde3b..191fcda 100644
--- a/src/Id/Concerns/ManagesTaxation.php
+++ b/src/Id/Concerns/ManagesTaxation.php
@@ -4,7 +4,7 @@ namespace Anikeen\Id\Concerns;
 
 use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesTaxation
 {
@@ -13,11 +13,10 @@ trait ManagesTaxation
     /**
      * Get VAT for the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
-    public function vat(): float
+    public function vatRate(): float
     {
-        return $this->getUserData()->vat;
+        return $this->getUserData()->vat_rate;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesTransactions.php b/src/Id/Concerns/ManagesTransactions.php
index d52f64d..d83a312 100644
--- a/src/Id/Concerns/ManagesTransactions.php
+++ b/src/Id/Concerns/ManagesTransactions.php
@@ -6,7 +6,7 @@ use Anikeen\Id\ApiOperations\Request;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Resources\Transactions;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesTransactions
 {
@@ -15,12 +15,15 @@ trait ManagesTransactions
     /**
      * Get transactions from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function transactions(): Transactions
     {
-        return (new Transactions($this->request('GET', 'v1/transactions')))
-            ->setBillable($this);;
+        if (!isset($this->transactionsCache)) {
+            $this->transactionsCache = Transactions::builder(fn() => $this->request('GET', 'v1/transactions'))
+                ->setBillable($this);
+        }
+
+        return $this->transactionsCache;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Concerns/ManagesUsers.php b/src/Id/Concerns/ManagesUsers.php
index c99b6fe..3e00ee4 100644
--- a/src/Id/Concerns/ManagesUsers.php
+++ b/src/Id/Concerns/ManagesUsers.php
@@ -7,7 +7,7 @@ use Anikeen\Id\ApiOperations\Get;
 use Anikeen\Id\ApiOperations\Post;
 use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 trait ManagesUsers
 {
@@ -17,8 +17,7 @@ trait ManagesUsers
     /**
      * Get currently authed user with Bearer Token
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function getAuthedUser(): Result
     {
@@ -40,8 +39,7 @@ trait ManagesUsers
      *     - username:    The username (optional)
      *     - email:       The email (required)
      *     - password:    The password (optional, can be reset by the user if not provided)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function createUser(array $attributes): Result
     {
@@ -52,8 +50,7 @@ trait ManagesUsers
      * Checks if the given email exists.
      *
      * @param string $email The email to check.
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function isEmailExisting(string $email): Result
     {
diff --git a/src/Id/Exceptions/CollectionException.php b/src/Id/Exceptions/CollectionException.php
new file mode 100644
index 0000000..637070c
--- /dev/null
+++ b/src/Id/Exceptions/CollectionException.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Anikeen\Id\Exceptions;
+
+use Anikeen\Id\Result;
+use Exception;
+
+class CollectionException extends Exception
+{
+
+}
\ No newline at end of file
diff --git a/src/Id/Exceptions/ResourceException.php b/src/Id/Exceptions/ResourceException.php
new file mode 100644
index 0000000..258e38c
--- /dev/null
+++ b/src/Id/Exceptions/ResourceException.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Anikeen\Id\Exceptions;
+
+use Anikeen\Id\Result;
+use Exception;
+
+class ResourceException extends Exception
+{
+    //
+}
\ No newline at end of file
diff --git a/src/Id/Resources/Address.php b/src/Id/Resources/Address.php
index 65cd491..b42ed57 100644
--- a/src/Id/Resources/Address.php
+++ b/src/Id/Resources/Address.php
@@ -3,9 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 /**
  * @property string $id
@@ -63,20 +61,18 @@ class Address extends BaseResource
      *    - email:                   Email address (optional, e.g. for delivery notifications)
      *    - primary:                 Whether this address should be the primary address (optional)
      *    - primary_billing_address: Whether this address should be the primary billing address (optional)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function update(array $attributes = []): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/addresses/%s', $this->id), $attributes)))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/addresses/%s', $this->id), $attributes)))
             ->setBillable($this->billable);
     }
 
     /**
      * Delete given address from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function delete(): bool
     {
diff --git a/src/Id/Resources/Addresses.php b/src/Id/Resources/Addresses.php
index dd3b5f8..2232a05 100644
--- a/src/Id/Resources/Addresses.php
+++ b/src/Id/Resources/Addresses.php
@@ -3,9 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 class Addresses extends BaseCollection
 {
@@ -44,12 +42,11 @@ class Addresses extends BaseCollection
      * 　  - email:                   Email address (optional, e.g. for delivery notifications)
      * 　  - primary:                 Whether this address should be the primary address (optional)
      * 　  - primary_billing_address: Whether this address should be the primary billing address (optional)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function create(array $attributes = []): Address
     {
-        return (new Address($this->billable->request('POST', 'v1/addresses', $attributes)))
+        return (new Address(fn() => $this->billable->request('POST', 'v1/addresses', $attributes)))
             ->setBillable($this->billable);
     }
 
@@ -58,31 +55,25 @@ class Addresses extends BaseCollection
      */
     public function find(string $id): ?Address
     {
-        $result = $this->billable->request('GET', sprintf('v1/addresses/%s', $id));
-
-        return $result->success() ?
-            (new Address($result))
-                ->setBillable($this->billable)
-            : null;
+        return (new Address(fn() => $this->billable->request('GET', sprintf('v1/addresses/%s', $id))))
+                ->setBillable($this->billable);
     }
 
     /**
      * Get default address from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function defaultBillingAddress(): Address
     {
-        return (new Address($this->billable->request('GET', sprintf('v1/addresses/%s', $this->billable->getUserData()->billing_address_id))))
+        return (new Address(fn() => $this->billable->request('GET', sprintf('v1/addresses/%s', $this->billable->getUserData()->billing_address_id))))
             ->setBillable($this->billable);
     }
 
     /**
      * Check if the current user has a default billing address.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function hasDefaultBillingAddress(): bool
     {
diff --git a/src/Id/Resources/BaseCollection.php b/src/Id/Resources/BaseCollection.php
index 64ad11f..ce982bf 100644
--- a/src/Id/Resources/BaseCollection.php
+++ b/src/Id/Resources/BaseCollection.php
@@ -2,17 +2,51 @@
 
 namespace Anikeen\Id\Resources;
 
-use Anikeen\Id\Concerns\MagicProperties;
+use Anikeen\Id\AnikeenId;
+use Anikeen\Id\Exceptions\CollectionException;
+use Anikeen\Id\Exceptions\ResourceException;
+use Anikeen\Id\Helpers\Paginator;
 use Anikeen\Id\Result;
+use Closure;
+use GuzzleHttp\Psr7\Response;
 use JsonSerializable;
+use Throwable;
 
+/**
+ * @property bool $success
+ * @property mixed $data
+ * @property int $total
+ * @property int $status
+ * @property null|array $links
+ * @property null|array $meta
+ * @property null|Paginator $paginator
+ * @property AnikeenId $anikeenId
+ * @property Response $response
+ * @property null|Throwable $exception
+ */
 abstract class BaseCollection implements JsonSerializable
 {
-    use MagicProperties;
+    private Closure $callable;
+    public ?Result $result = null;
 
-    public function __construct(protected Result $result)
+    /**
+     * @throws CollectionException
+     */
+    protected function __construct(callable $callable)
     {
-        //
+        $this->result = $callable();
+
+        if (!$this->result->success()) {
+            throw new CollectionException(sprintf('%s for collection [%s]', rtrim($this->result->data->message, '.'), get_called_class()), $this->result->response->getStatusCode());
+        }
+    }
+
+    /**
+     * @throws CollectionException
+     */
+    public static function builder(callable $callable): static
+    {
+        return new static($callable, false);
     }
 
     /**
@@ -43,4 +77,14 @@ abstract class BaseCollection implements JsonSerializable
      * Returns the Resource based on the ID.
      */
     abstract public function find(string $id): ?BaseResource;
+
+    public function __get(string $name)
+    {
+        return $this->result->{$name} ?? null;
+    }
+
+    public function __isset(string $name): bool
+    {
+        return isset($this->result->{$name});
+    }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/BaseResource.php b/src/Id/Resources/BaseResource.php
index 1f0cdfb..d6de860 100644
--- a/src/Id/Resources/BaseResource.php
+++ b/src/Id/Resources/BaseResource.php
@@ -2,17 +2,38 @@
 
 namespace Anikeen\Id\Resources;
 
-use Anikeen\Id\Concerns\MagicProperties;
+use Anikeen\Id\Exceptions\ResourceException;
 use Anikeen\Id\Result;
 use JsonSerializable;
 
 abstract class BaseResource implements JsonSerializable
 {
-    use MagicProperties;
+    public Result $result;
 
-    public function __construct(protected Result $result)
+    /**
+     * @throws ResourceException
+     */
+    public function __construct(callable $callable)
     {
-        $this->setMagicProperties($this->result->data);
+        $this->result = $callable();
+
+        if (!$this->result->success()) {
+            throw new ResourceException(sprintf('%s for resource [%s]', rtrim($this->result->data->message, '.'), get_called_class()), $this->result->response->getStatusCode());
+        }
+
+        foreach ($this->result->data as $key => $value) {
+            if (!property_exists($this, $key)) {
+                $this->{$key} = $value;
+            }
+        }
+    }
+
+    /**
+     * Returns the collection of resources as a JSON string.
+     */
+    public function jsonSerialize(): array
+    {
+        return $this->toArray();
     }
 
     /**
@@ -23,11 +44,13 @@ abstract class BaseResource implements JsonSerializable
         return (array)$this->result->data;
     }
 
-    /**
-     * Returns the collection of resources as a JSON string.
-     */
-    public function jsonSerialize(): array
+    public function __get(string $name)
     {
-        return $this->toArray();
+        return null;
+    }
+
+    public function __isset(string $name): bool
+    {
+        return false;
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/Invoice.php b/src/Id/Resources/Invoice.php
index 323af56..6b82baf 100644
--- a/src/Id/Resources/Invoice.php
+++ b/src/Id/Resources/Invoice.php
@@ -3,8 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 /**
  * @property string $id
@@ -16,8 +15,7 @@ class Invoice extends BaseResource
     /**
      * Get temporary download url from given invoice.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function getInvoiceTemporaryUrl(): string
     {
diff --git a/src/Id/Resources/Invoices.php b/src/Id/Resources/Invoices.php
index 24606c7..3d9dc8f 100644
--- a/src/Id/Resources/Invoices.php
+++ b/src/Id/Resources/Invoices.php
@@ -3,9 +3,6 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
 
 class Invoices extends BaseCollection
 {
@@ -16,11 +13,7 @@ class Invoices extends BaseCollection
      */
     public function find(string $id): ?Invoice
     {
-        $result = $this->billable->request('GET', sprintf('v1/invoices/%s', $id));
-
-        return $result->success()
-            ? (new Invoice($result))
-                ->setBillable($this->billable)
-            : null;
+        return (new Invoice(fn() => $this->billable->request('GET', sprintf('v1/invoices/%s', $id))))
+                ->setBillable($this->billable);
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/Order.php b/src/Id/Resources/Order.php
index 3189d9a..9a799a0 100644
--- a/src/Id/Resources/Order.php
+++ b/src/Id/Resources/Order.php
@@ -3,8 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 /**
  * @property string $id
@@ -55,44 +54,40 @@ class Order extends BaseResource
      *  } $attributes The order data:
      *    - billing_address:  Billing address (ISO 3166-1 alpha-2 country code)
      *    - shipping_address: Shipping address (first name, last name, ISO 3166-1 alpha-2 country code)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function update(array $attributes = []): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/orders/%s', $this->id), $attributes)))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/orders/%s', $this->id), $attributes)))
             ->setBillable($this->billable);
     }
 
     /**
      * Checkout given order from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
-    public function checkout(string $orderId): self
+    public function checkout(): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/orders/%s/checkout', $this->id))))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/orders/%s/checkout', $this->id))))
             ->setBillable($this->billable);
     }
 
     /**
      * Revoke given order from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
-    public function revoke(string $orderId): self
+    public function revoke(): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/orders/%s/revoke', $this->id))))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/orders/%s/revoke', $this->id))))
             ->setBillable($this->billable);
     }
 
     /**
      * Delete given order from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function delete(): bool
     {
@@ -102,12 +97,11 @@ class Order extends BaseResource
     /**
      * Get order items from given order.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function orderItems(array $parameters = []): OrderItems
     {
-        return (new OrderItems($this->billable->request('GET', sprintf('v1/orders/%s/items', $this->id), [], $parameters)))
+        return OrderItems::builder(fn() => $this->billable->request('GET', sprintf('v1/orders/%s/items', $this->id), [], $parameters))
             ->setBillable($this->billable)
             ->setParent($this);
     }
diff --git a/src/Id/Resources/OrderItem.php b/src/Id/Resources/OrderItem.php
index 2cf0e1b..36308d5 100644
--- a/src/Id/Resources/OrderItem.php
+++ b/src/Id/Resources/OrderItem.php
@@ -4,8 +4,7 @@ namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
 use Anikeen\Id\Concerns\HasParent;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 /**
  * @property string $id
@@ -31,12 +30,11 @@ class OrderItem extends BaseResource
      *       }>
      *   } $attributes The order data:
      *     - items:           Array of order items, each with type, name, description, price, unit, and quantity
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function update(array $attributes = []): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/orders/%s/items/%s', $this->parent->id, $this->id), $attributes)))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/orders/%s/items/%s', $this->parent->id, $this->id), $attributes)))
             ->setBillable($this->billable)
             ->setParent($this->parent);
     }
@@ -44,8 +42,7 @@ class OrderItem extends BaseResource
     /**
      * Delete given order item from given order.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function delete(): bool
     {
diff --git a/src/Id/Resources/OrderItems.php b/src/Id/Resources/OrderItems.php
index 49ffbfc..481aa0d 100644
--- a/src/Id/Resources/OrderItems.php
+++ b/src/Id/Resources/OrderItems.php
@@ -4,9 +4,8 @@ namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
 use Anikeen\Id\Concerns\HasParent;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 class OrderItems extends BaseCollection
 {
@@ -30,12 +29,11 @@ class OrderItems extends BaseCollection
      *      }>
      *  } $attributes The order data:
      *    - items:           Array of order items, each with type, name, description, price, unit, and quantity
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function create(string $orderId, array $attributes = []): OrderItem
     {
-        return (new OrderItem($this->billable->request('POST', sprintf('v1/orders/%s', $orderId), $attributes)))
+        return (new OrderItem(fn() => $this->billable->request('POST', sprintf('v1/orders/%s', $orderId), $attributes)))
             ->setBillable($this->billable)
             ->setParent($this->parent);
     }
@@ -45,13 +43,8 @@ class OrderItems extends BaseCollection
      */
     public function find(string $id): ?OrderItem
     {
-        /** @var Result $result */
-        $result = $this->parent->request('GET', sprintf('v1/orders/%s/items/%s', $this->parent->id, $id));
-
-        return $result->success() ?
-            (new OrderItem($result))
-                ->setBillable($this->billable)
-                ->setParent($this->parent)
-            : null;
+        return (new OrderItem(fn() => $this->parent->request('GET', sprintf('v1/orders/%s/items/%s', $this->parent->id, $id))))
+            ->setBillable($this->billable)
+            ->setParent($this->parent);
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/Orders.php b/src/Id/Resources/Orders.php
index 24a1440..49e3302 100644
--- a/src/Id/Resources/Orders.php
+++ b/src/Id/Resources/Orders.php
@@ -3,9 +3,8 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 class Orders extends BaseCollection
 {
@@ -62,29 +61,22 @@ class Orders extends BaseCollection
      *   - billing_address:  Billing address (ISO 3166-1 alpha-2 country code)
      *   - shipping_address: Shipping address (first name, last name, ISO 3166-1 alpha-2 country code)
      *   - items:            Array of order items (each with type, name, price, unit, units, and quantity)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function create(array $attributes = []): Order
     {
-        return (new Order($this->billable->request('POST', 'v1/orders', $attributes)))
+        return (new Order(fn() => $this->billable->request('POST', 'v1/orders', $attributes)))
             ->setBillable($this->billable);
     }
 
     /**
      * Get given order from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function find(string $id): ?Order
     {
-        /** @var Result $result */
-        $result = $this->billable->request('GET', sprintf('v1/orders/%s', $id));
-
-        return $result->success()
-            ? (new Order($result))
-                ->setBillable($this->billable)
-            : null;
+        return (new Order(fn() => $this->billable->request('GET', sprintf('v1/orders/%s', $id))))
+            ->setBillable($this->billable);
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/PaymentMethods.php b/src/Id/Resources/PaymentMethods.php
index ca6f9e0..d894456 100644
--- a/src/Id/Resources/PaymentMethods.php
+++ b/src/Id/Resources/PaymentMethods.php
@@ -3,65 +3,53 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 class PaymentMethods extends BaseCollection
 {
     use HasBillable;
 
-    private ?PaymentMethod $cachedDefaultPaymentMethod = null;
-
     /**
      * Check if current user has at least one payment method.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function hasPaymentMethod(): bool
     {
         return $this->result->count() > 0;
     }
 
-    /**
-     * Get default payment method from the current user.
-     *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
-     */
-    public function defaultPaymentMethod(): PaymentMethod
-    {
-        if ($this->cachedDefaultPaymentMethod === null) {
-            $this->cachedDefaultPaymentMethod = (new PaymentMethod(
-                $this->billable->request('GET', 'v1/payment-methods/default')
-            ))->setBillable($this->billable);
-        }
-
-        return $this->cachedDefaultPaymentMethod;
-    }
-
     /**
      * Check if the current user has a default payment method.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function hasDefaultPaymentMethod(): bool
     {
         return $this->defaultPaymentMethod()?->id !== null;
     }
 
+    /**
+     * Get default payment method from the current user.
+     *
+     * @throws Throwable
+     */
+    public function defaultPaymentMethod(): PaymentMethod
+    {
+        if (!isset($this->defaultPaymentMethodCache)) {
+            $this->defaultPaymentMethodCache = (new PaymentMethod(fn() => $this->billable->request('GET', 'v1/payment-methods/default')))
+                ->setBillable($this->billable);
+        }
+
+        return $this->defaultPaymentMethodCache;
+    }
+
     /**
      * {@inheritDoc}
      */
     public function find(string $id): ?PaymentMethod
     {
-        $result = $this->billable->request('GET', sprintf('v1/payment-methods/%s', $id));
-
-        return $result->success()
-            ? (new PaymentMethod($result))
-                ->setBillable($this->billable)
-            : null;
+        return (new PaymentMethod(fn() => $this->billable->request('GET', sprintf('v1/payment-methods/%s', $id))))
+            ->setBillable($this->billable);
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/SshKey.php b/src/Id/Resources/SshKey.php
index 80b0a6b..52b726a 100644
--- a/src/Id/Resources/SshKey.php
+++ b/src/Id/Resources/SshKey.php
@@ -3,8 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasParent;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 /**
  * @property string $id
@@ -16,8 +15,7 @@ class SshKey extends BaseResource
     /**
      * Deletes a given ssh key for the currently authed user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function delete(): bool
     {
diff --git a/src/Id/Resources/SshKeys.php b/src/Id/Resources/SshKeys.php
index 293895d..1934231 100644
--- a/src/Id/Resources/SshKeys.php
+++ b/src/Id/Resources/SshKeys.php
@@ -3,9 +3,8 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasParent;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
 use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 class SshKeys extends BaseCollection
 {
@@ -16,12 +15,11 @@ class SshKeys extends BaseCollection
      *
      * @param string $publicKey The public key to be added
      * @param string|null $name The name of the key (optional)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function create(string $publicKey, ?string $name = null): SshKey
     {
-        return (new SshKey($this->parent->post('v1/ssh-keys', [
+        return (new SshKey(fn() => $this->parent->post('v1/ssh-keys', [
             'public_key' => $publicKey,
             'name' => $name,
         ])))->setParent($this->parent);
@@ -32,12 +30,6 @@ class SshKeys extends BaseCollection
      */
     public function find(string $id): ?SshKey
     {
-        /** @var Result $result */
-        $result = $this->parent->get(sprintf('v1/ssh-keys/%s', $id));
-
-        return $result->success()
-            ? (new SshKey($result))
-                ->setParent($this->parent)
-            : null;
+        return (new SshKey(fn() => $this->parent->get(sprintf('v1/ssh-keys/%s', $id))));
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/Subscription.php b/src/Id/Resources/Subscription.php
index 45ebd75..fa43b5b 100644
--- a/src/Id/Resources/Subscription.php
+++ b/src/Id/Resources/Subscription.php
@@ -3,8 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 /**
  * @property string $id
@@ -26,6 +25,7 @@ class Subscription extends BaseResource
      * Update a given subscription from the current user.
      *
      * @param array{
+     *      group: string,
      *      name: string,
      *      description: null|string,
      *      unit: string,
@@ -36,6 +36,7 @@ class Subscription extends BaseResource
      *      webhook_url: null|string,
      *      webhook_secret: null|string
      *  } $attributes The subscription data:
+     *    - group:          The group (optional)
      *    - name:           The name (required when set)
      *    - description:    The description (optional)
      *    - unit:           The unit (required when set, e.g. "hour", "day", "week", "month", "year")
@@ -45,56 +46,62 @@ class Subscription extends BaseResource
      *    - ends_at:        The end date (optional)
      *    - webhook_url:    The webhook URL (optional)
      *    - webhook_secret: The webhook secret (optional)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function update(array $attributes): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/subscriptions/%s', $this->id), $attributes)))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/subscriptions/%s', $this->id), $attributes)))
             ->setBillable($this->billable);
     }
 
     /**
      * Force given subscription to check out (trusted apps only).
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function checkout(): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/subscriptions/%s/checkout', $this->id))))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/subscriptions/%s/checkout', $this->id))))
             ->setBillable($this->billable);
     }
 
     /**
      * Revoke a given running subscription from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function revoke(): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/subscriptions/%s/revoke', $this->id))))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/subscriptions/%s/revoke', $this->id))))
+            ->setBillable($this->billable);
+    }
+
+    /**
+     * Pause a given running subscription from the current user.
+     *
+     * @throws Throwable
+     */
+    public function pause(): self
+    {
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/subscriptions/%s/pause', $this->id))))
             ->setBillable($this->billable);
     }
 
     /**
      * Resume a given running subscription from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function resume(): self
     {
-        return (new self($this->billable->request('PUT', sprintf('v1/subscriptions/%s/resume', $this->id))))
+        return (new self(fn() => $this->billable->request('PUT', sprintf('v1/subscriptions/%s/resume', $this->id))))
             ->setBillable($this->billable);
     }
 
     /**
      * Delete a given subscription from the current user.
      *
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function delete(): bool
     {
diff --git a/src/Id/Resources/Subscriptions.php b/src/Id/Resources/Subscriptions.php
index 8933707..f3ba0fc 100644
--- a/src/Id/Resources/Subscriptions.php
+++ b/src/Id/Resources/Subscriptions.php
@@ -3,8 +3,7 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use GuzzleHttp\Exception\GuzzleException;
+use Throwable;
 
 class Subscriptions extends BaseCollection
 {
@@ -14,6 +13,7 @@ class Subscriptions extends BaseCollection
      * Create a new subscription for the current user.
      *
      * @param array{
+     *      group: null|string,
      *      name: string,
      *      description: null|string,
      *      unit: string,
@@ -24,6 +24,7 @@ class Subscriptions extends BaseCollection
      *      webhook_url: null|string,
      *      webhook_secret: null|string
      *  } $attributes The subscription data:
+     *    - group:          The group (optional)
      *    - name:           The name
      *    - description:    The description (optional)
      *    - unit:           The unit (e.g. "hour", "day", "week", "month", "year")
@@ -33,12 +34,11 @@ class Subscriptions extends BaseCollection
      *    - ends_at:        The end date (optional)
      *    - webhook_url:    The webhook URL (optional)
      *    - webhook_secret: The webhook secret (optional)
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      */
     public function create(array $attributes): Subscription
     {
-        return (new Subscription($this->billable->request('POST', 'v1/subscriptions', $attributes)))
+        return (new Subscription(fn() => $this->billable->request('POST', 'v1/subscriptions', $attributes)))
             ->setBillable($this->billable);
     }
 
@@ -47,11 +47,7 @@ class Subscriptions extends BaseCollection
      */
     public function find(string $id): ?Subscription
     {
-        $result = $this->billable->request('GET', sprintf('v1/subscriptions/%s', $id));
-
-        return $result->success()
-            ? (new Subscription($result))
-                ->setBillable($this->billable)
-            : null;
+        return (new Subscription(fn() => $this->billable->request('GET', sprintf('v1/subscriptions/%s', $id))))
+            ->setBillable($this->billable);
     }
 }
\ No newline at end of file
diff --git a/src/Id/Resources/Transactions.php b/src/Id/Resources/Transactions.php
index 6846fa1..6a2e285 100644
--- a/src/Id/Resources/Transactions.php
+++ b/src/Id/Resources/Transactions.php
@@ -3,9 +3,8 @@
 namespace Anikeen\Id\Resources;
 
 use Anikeen\Id\Concerns\HasBillable;
-use Anikeen\Id\Exceptions\RequestRequiresClientIdException;
-use Anikeen\Id\Result;
-use GuzzleHttp\Exception\GuzzleException;
+use Anikeen\Id\Exceptions\ResourceException;
+use Throwable;
 
 class Transactions extends BaseCollection
 {
@@ -15,13 +14,13 @@ class Transactions extends BaseCollection
      * Create a new transaction for the current user.
      *
      * @param array $attributes The attributes for the transaction.
-     * @throws RequestRequiresClientIdException
-     * @throws GuzzleException
+     * @throws Throwable
      * @todo Add type hinting for the attributes array.
      */
     public function create(array $attributes = []): Transaction
     {
-        return new Transaction($this->billable->request('POST', 'v1/transactions', $attributes));
+        return (new Transaction($this->billable->request('POST', 'v1/transactions', $attributes)))
+            ->setBillable($this->billable);
     }
 
     /**
@@ -29,11 +28,7 @@ class Transactions extends BaseCollection
      */
     public function find(string $id): ?Transaction
     {
-        $result = $this->billable->request('GET', sprintf('v1/transactions/%s', $id));
-
-        return $result->success()
-            ? (new Transaction($result))
-                ->setBillable($this->billable)
-            : null;
+        return (new Transaction(fn() => $this->billable->request('GET', sprintf('v1/transactions/%s', $id))))
+                ->setBillable($this->billable);
     }
 }
\ No newline at end of file