MDL-59869 oauth2: Fix notification method

lib/classes/oauth2/refresh_system_tokens_task.php

@@ -25,12 +25,13 @@
 namespace core\oauth2;
 
 use \core\task\scheduled_task;
+use core_user;
 use moodle_exception;
 
 defined('MOODLE_INTERNAL') || die();
 
 /**
- * Simple task to delete old messaging records.
+ * Task to refresh system tokens regularly. Admins are notified in case an authorisation expires.
  * @package    core
  * @copyright  2017 Damyon Wiese
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
@@ -51,6 +52,7 @@ class refresh_system_tokens_task extends scheduled_task {
      * @param \core\oauth2\issuer $issuer
      */
     protected function notify_admins(\core\oauth2\issuer $issuer) {
+        global $CFG;
         $admins = get_admins();
 
         if (empty($admins)) {
@@ -63,8 +65,8 @@ class refresh_system_tokens_task extends scheduled_task {
             $message = new \core\message\message();
             $message->courseid          = SITEID;
             $message->component         = 'moodle';
-            $message->name              = 'oauthrefreshtokenexpired';
-            $message->userfrom          = core\user::get_noreply_user();
+            $message->name              = 'errors';
+            $message->userfrom          = core_user::get_noreply_user();
             $message->userto            = $admin;
             $message->subject           = $short;
             $message->fullmessage       = $long;