/**
  * Small helper function to make sure we format the username properly as
  * specified by the `metamta.user-address-format` configuration value.
  */
 private function getUserName(PhabricatorUser $user)
 {
     $format = PhabricatorEnv::getEnvConfig('metamta.user-address-format');
     switch ($format) {
         case 'short':
             $name = $user->getUserName();
             break;
         case 'real':
             $name = strlen($user->getRealName()) ? $user->getRealName() : $user->getUserName();
             break;
         case 'full':
         default:
             $name = $user->getFullName();
             break;
     }
     return $name;
 }