Show error message if exists

Author: soullivaneuh

lib/Github/HttpClient/Listener/ErrorListener.php

@@ -70,7 +70,11 @@ public function onRequestError(Event $event)
                                 break;
 
                             case 'invalid':
-                                $errors[] = sprintf('Field "%s" is invalid, for resource "%s"', $error['field'], $error['resource']);
+                                if (isset($error['message'])) {
+                                    $errors[] = sprintf('Field "%s" is invalid, for resource "%s": "%s"', $error['field'], $error['resource'], $error['message']);
+                                } else {
+                                    $errors[] = sprintf('Field "%s" is invalid, for resource "%s"', $error['field'], $error['resource']);
+                                }
                                 break;
 
                             case 'already_exists':