diff --git a/core/lib/Drupal/Core/Authentication/AuthenticationManager.php b/core/lib/Drupal/Core/Authentication/AuthenticationManager.php
index d3630c4..582bfa3 100644
--- a/core/lib/Drupal/Core/Authentication/AuthenticationManager.php
+++ b/core/lib/Drupal/Core/Authentication/AuthenticationManager.php
@@ -83,8 +83,6 @@ public function applies(Request $request) {
    * {@inheritdoc}
    */
   public function authenticate(Request $request) {
-    global $user;
-
     $account = NULL;
 
     // Iterate the availlable providers.
@@ -112,10 +110,7 @@ public function authenticate(Request $request) {
     //  for later access.
     $request->attributes->set('_authentication_provider', $this->triggeredProviderId);
 
-    // The global $user object is included for backward compatibility only and
-    // should be considered deprecated.
-    // @todo Remove this line once global $user is no longer used.
-    $user = $account;
+    \Drupal::getContainer()->set('current_user', $account);
 
     return $account;
   }