Cleanup frontend controllers and middleware

app/Http/Requests/Server/Subuser/SubuserStoreFormRequest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Pterodactyl\Http\Requests\Server\Subuser;
+
+use Pterodactyl\Http\Requests\Server\ServerFormRequest;
+
+class SubuserStoreFormRequest extends ServerFormRequest
+{
+    /**
+     * Return the user permission to validate this request aganist.
+     *
+     * @return string
+     */
+    protected function permission(): string
+    {
+        return 'create-subuser';
+    }
+
+    /**
+     * The rules to validate this request submission aganist.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'email' => 'required|email',
+            'permissions' => 'present|array',
+        ];
+    }
+}