std::string SlackUserRegistration::getTeamDomain(const std::string &token) {

	std::string url = "https://slack.com/api/team.info?token=" + Util::urlencode(token);

	rapidjson::Document resp;

	HTTPRequest req(HTTPRequest::Get, url);

	if (!req.execute(resp)) {

		LOG4CXX_ERROR(logger, req.getError());

		return "";

	}

	rapidjson::Value &team = resp["team"];

	if (!team.IsObject()) {

		LOG4CXX_ERROR(logger, "No 'team' object in the reply.");

		LOG4CXX_ERROR(logger, req.getRawData());

		return "";

	}

	rapidjson::Value &domain = team["domain"];

	if (!domain.IsString()) {

		LOG4CXX_ERROR(logger, "No 'domain' string in the reply.");

		LOG4CXX_ERROR(logger, req.getRawData());

		return "";

	}

	return domain.GetString();

}