diff --git a/src/GovTribe/LaravelKinvey/Database/Eloquent/User.php b/src/GovTribe/LaravelKinvey/Database/Eloquent/User.php
index a08a3e9..a62e185 100644
--- a/src/GovTribe/LaravelKinvey/Database/Eloquent/User.php
+++ b/src/GovTribe/LaravelKinvey/Database/Eloquent/User.php
@@ -49,7 +49,7 @@ public static function boot()
 	 */
 	public function getAuthIdentifier()
 	{
-		return $this->_id;
+		return $this->username;
 	}
 
 	/**