code: public static <T extends AVUser> T signUpOrLoginByMobilePhone(String mobilePhoneNumber, String smsCode, Class<T> clazz) {
      return signUpOrLoginByMobilePhoneInBackground(mobilePhoneNumber, smsCode, clazz).blockingSingle();
    }
docs: signUpOrLoginByMobilePhone
  @param mobilePhoneNumber
  @param smsCode
  @param clazz
  @param <T>
  @return