Add underlying code to handle authenticating websocket credentials

app/Http/Requests/Api/Remote/AuthenticateWebsocketDetailsRequest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Pterodactyl\Http\Requests\Api\Remote;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class AuthenticateWebsocketDetailsRequest extends FormRequest
+{
+    /**
+     * @return bool
+     */
+    public function authorize()
+    {
+        return true;
+    }
+
+    /**
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'server_uuid' => 'required|string',
+        ];
+    }
+}