Merge pull request #473 from darron1217/issue#467

Fix issue#467 id() method checks null instead of false

Modules/User/Repositories/Sentinel/SentinelAuthentication.php

@@ -164,7 +164,7 @@ class SentinelAuthentication implements Authentication
     {
         $user = $this->user();
 
-        if ($user === null) {
+        if ($user === false) {
             return 0;
         }