protected function generateEmail(OAuthInterface $oauth)
 {
     $email = $oauth->getEmail();
     if (!$email) {
         $email = $oauth->getOwner() . '-' . $oauth->getUsername() . '@' . '';
     }
     return $email;
 }
 protected function generateEmail(OAuthInterface $oauth)
 {
     return $oauth->getEmail();
 }