add user group validation

resources/lang/en_US/validation.php

@@ -268,6 +268,7 @@ return [
     'auto_budget_period_mandatory'    => 'The auto budget period is a mandatory field.',
 
     // no access to administration:
+    'no_auth_user_group'            => 'You have to be logged in to access this administration.',
     'no_access_user_group'            => 'You do not have the correct access rights for this administration.',
     'administration_owner_rename'     => 'You can\'t rename your standard administration.',
 ];