code: function(mobilePhoneNumber, options = {}) {
          const data = {
            mobilePhoneNumber,
          };
          if (options.validateToken) {
            data.validate_token = options.validateToken;
          }
          var request = AVRequest(
            'requestLoginSmsCode',
            null,
            null,
            'POST',
            data,
            options
          );
          return request;
        }
docs: Requests a logIn sms code to be sent to the specified mobile phone
  number associated with the user account. This sms code allows the user to
  login by AV.User.logInWithMobilePhoneSmsCode function.
  
  @param {String} mobilePhoneNumber The mobile phone number  associated with the
  user that want to login by AV.User.logInWithMobilePhoneSmsCode
  @param {AuthOptions} [options] AuthOptions plus:
  @param {String} [options.validateToken] a validate token returned by {@link AV.Cloud.verifyCaptcha}
  @return {Promise}