diff --git a/src/callback.php b/src/callback.php
index 74aa87c..70375d2 100644
--- a/src/callback.php
+++ b/src/callback.php
@@ -22,7 +22,7 @@
 
 
     // Save user data and token in session or database here
-    $_SESSION['user'] = $userData["name"];
+    $_SESSION['user'] = $userData["preferred_username"];
     $_SESSION['token'] = $token->getToken();
 
     // Redirect to index.php