Updated the configuration that had a bug when trying to return the authenticated user.

Author: lucadegasperi

src/config/oauth2.php

@@ -71,10 +71,18 @@
             'access_token_ttl' => 604800,
             'callback'         => function ($username, $password) {
 
-                return Auth::validate(array(
-                    'email'    => $username,
+                $credentials = array(
+                    'email' => $username,
                     'password' => $password,
-                ));
+                );
+
+                $valid = Auth::validate($credentials);
+
+                if (!$valid) {
+                    return false;
+                }
+
+                return Auth::getProvider()->retrieveByCredentials($credentials)->id;
             }
         ),