if (payload->getUsername()->empty()) {

		sendError(from, id, ErrorPayload::NotAcceptable, ErrorPayload::Modify);

		return true;

	}

	// TODO: Move this check to backend somehow

	if (CONFIG_STRING(m_config, "service.protocol") == "prpl-jabber") {

		// User tries to register himself.

		if ((Swift::JID(*payload->getUsername()).toBare() == from.toBare())) {

			sendError(from, id, ErrorPayload::NotAcceptable, ErrorPayload::Modify);

			return true;

		}

		// User tries to register someone who's already registered.

		UserInfo user_row;

		bool registered = m_storageBackend->getUser(Swift::JID(*payload->getUsername()).toBare().toString(), user_row);

		if (registered) {

			sendError(from, id, ErrorPayload::NotAcceptable, ErrorPayload::Modify);

			return true;

		}

	}

	std::string username = *payload->getUsername();

	std::string newUsername(username);

	if (!CONFIG_STRING(m_config, "registration.username_mask").empty()) {

		newUsername = CONFIG_STRING(m_config, "registration.username_mask");

		boost::replace_all(newUsername, "$username", username);

	}

//TODO: Part of spectrum1 registration stuff, this should be potentially rewritten for S2 too

// 	if (!m_component->protocol()->isValidUsername(newUsername)) {

// 		Log("UserRegistration", "This is not valid username: "<< newUsername);

// 		sendError(from, id, ErrorPayload::NotAcceptable, ErrorPayload::Modify);

// 		return true;

// 	}

//TODO: Part of spectrum1 registration stuff, this should be potentially rewritten for S2 too

// #if GLIB_CHECK_VERSION(2,14,0)

// 	if (!CONFIG_STRING(m_config, "registration.reg_allowed_usernames").empty() &&

// 		!g_regex_match_simple(CONFIG_STRING(m_config, "registration.reg_allowed_usernames"), newUsername.c_str(),(GRegexCompileFlags) (G_REGEX_CASELESS | G_REGEX_EXTENDED), (GRegexMatchFlags) 0)) {

// 		Log("UserRegistration", "This is not valid username: "<< newUsername);

// 		sendError(from, id, ErrorPayload::NotAcceptable, ErrorPayload::Modify);

// 		return true;

// 	}

// #endif

	if (!registered) {

		res.jid = barejid;

		res.password = *payload->getPassword();

		res.language = language;

		res.encoding = encoding;

		res.vip = 0;

		registerUser(res);

	}

	else {

		res.jid = barejid;

		res.password = *payload->getPassword();

		res.language = language;

		res.encoding = encoding;

		m_storageBackend->setUser(res);

		onUserUpdated(res);

	}

	sendResponse(from, id, InBandRegistrationPayload::ref());

	return true;

}

}