use subscriptionid as code

serviceAddon.php

@@ -179,6 +179,7 @@ function serviceAddon_AdminServicesTabFields($params) {
 
 function serviceAddon_ClientArea($params) {
     return array(
+        'templatefile' => 'clientarea',
         'vars' => [
             'blubb' => $params['model']->subscriptionid
         ],