Add the ability to log users and their shared subdomains

app/Server/LoggerRepository/NullLogger.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Server\LoggerRepository;
+
+use App\Contracts\LoggerRepository;
+use Clue\React\SQLite\DatabaseInterface;
+use React\Promise\PromiseInterface;
+
+class NullLogger implements LoggerRepository
+{
+    public function logSubdomain($authToken, $subdomain)
+    {
+        // noop
+    }
+
+    public function getLogsBySubdomain($subdomain): PromiseInterface
+    {
+        return \React\Promise\resolve([]);
+    }
+
+    public function getLogs(): PromiseInterface
+    {
+        return \React\Promise\resolve([]);
+    }
+}