public static function getServiceAccountName() {
    $req = new GetServiceAccountNameRequest();
    $resp = new GetServiceAccountNameResponse();

    try {
      ApiProxy::makeSyncCall(self::PACKAGE_NAME, 'GetServiceAccountName', $req,
          $resp);
    } catch (ApplicationError $e) {
      throw self::applicationErrorToException($e);
    }

    return $resp->getServiceAccountName();
  }