Controller Permission

controllers/Playground.php

@@ -9,6 +9,8 @@ class Playground extends Controller
     parent::__construct();
   }
 
+  public $requiredPermissions = ['germanairlinesva.graphql.master'];
+
   public function index()
   {
     $this->pageTitle = 'germanairlinesva.graphql::lang.menu.playground';