code: public DeviceRegConfirmUserResponseEnvelope confirmUser(DeviceRegConfirmUserRequest registrationInfo) throws ApiException {
          ApiResponse<DeviceRegConfirmUserResponseEnvelope> resp = confirmUserWithHttpInfo(registrationInfo);
          return resp.getData();
      }
docs: Confirm User
  This call updates the registration request issued earlier by associating it with an authenticated user and captures all additional information required to add a new device.
  @param registrationInfo Device Registration information. (required)
  @return DeviceRegConfirmUserResponseEnvelope
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body