1 files changed, 1 insertions, 1 deletions
diff --git a/Core/Authentication/Provider/UserAuthenticationProvider.php b/Core/Authentication/Provider/UserAuthenticationProvider.php
index ded53e4..2674088 100644
--- a/Core/Authentication/Provider/UserAuthenticationProvider.php
+++ b/Core/Authentication/Provider/UserAuthenticationProvider.php
@@ -62,7 +62,7 @@ abstract class UserAuthenticationProvider implements AuthenticationProviderInter
         }
 
         $username = $token->getUsername();
-        if (empty($username)) {
+        if ('' === $username || null === $username) {
             $username = 'NONE_PROVIDED';
         }