Implement basic code for creating/updating a subuser

app/Http/Requests/Api/Client/Servers/Subusers/UpdateSubuserRequest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Pterodactyl\Http\Requests\Api\Client\Servers\Subusers;
+
+use Pterodactyl\Models\Permission;
+
+class UpdateSubuserRequest extends AbstractSubuserRequest
+{
+    /**
+     * @return string
+     */
+    public function permission()
+    {
+        return Permission::ACTION_USER_UPDATE;
+    }
+
+    /**
+     * @return array
+     */
+    public function rules(): array
+    {
+        return [
+            'permissions' => 'required|array',
+            'permissions.*' => 'string',
+        ];
+    }
+}