From ac66abbd21303bfcb0493115a24c7874d20e8353 Mon Sep 17 00:00:00 2001
From: Dmitrii Metelkin <dmitriim@catalyst-au.net>
Date: Sat, 16 Nov 2019 23:20:22 +1100
Subject: [PATCH] Fix error when page url is not set

---
 auth.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/auth.php b/auth.php
index adc6ed2..7bb7678 100644
--- a/auth.php
+++ b/auth.php
@@ -137,7 +137,7 @@ class auth_plugin_userkey extends auth_plugin_base {
      * @throws \moodle_exception If something went wrong.
      */
     public function user_login_userkey() {
-        global $SESSION, $CFG, $PAGE;
+        global $SESSION, $CFG;
 
         $keyvalue = required_param('key', PARAM_ALPHANUM);
         $wantsurl = optional_param('wantsurl', '', PARAM_URL);
@@ -153,7 +153,7 @@ class auth_plugin_userkey extends auth_plugin_base {
         if (isloggedin()) {
             if ($SESSION->userid != $key->userid) {
                 require_logout();
-                $this->redirect($PAGE->url); // login url retry
+                $this->user_login_userkey();
             }
         }