[5.2] Fixing timezone and language parameter in API token auth response (joomla#43351)

* Fixing timezone and language parameter in API token auth response

* Switching from GMT to UTC

* Update libraries/src/User/User.php

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Co-authored-by: Allon Moritz <[email protected]>

Author: Hackwar

plugins/api-authentication/token/src/Extension/Token.php

@@ -252,8 +252,8 @@ public function onUserAuthenticate(AuthenticationEvent $event): void
         $response->username      = $user->username;
         $response->email         = $user->email;
         $response->fullname      = $user->name;
-        $response->timezone      = $user->get('timezone');
-        $response->language      = $user->get('language');
+        $response->timezone      = $user->getParam('timezone', $this->getApplication()->get('offset', 'UTC'));
+        $response->language      = $user->getParam('language', $this->getApplication()->get('language'));
 
         // Stop event propagation when status is STATUS_SUCCESS
         $event->stopPropagation();