[ServiceContract]
public interface IServerService
{
	[OperationContract]
	Task<RES_LOGIN> RequestUserLogin(REQ_LOGIN reqData);
}		

// http://localhost:15501/GameService/RequestUserLogin
[WebInvoke(Method = "POST",
			RequestFormat = WebMessageFormat.Json,
			ResponseFormat = WebMessageFormat.Json,
			UriTemplate = "RequestUserLogin")]
public async Task<RES_LOGIN> RequestUserLogin(REQ_LOGIN reqData)
{
	try
	{
		var result = await ReqLogin.ProcessAsync(reqData);
		return result;
	}
	catch (Exception ex)
	{
		return new RES_LOGIN { Result = ERROR_CODE.SERVER_ERROR };
	}
}

public static async Task<RES_LOGIN> ProcessAsync(REQ_LOGIN reqData)
{
	var 메모리DB_인증성공 = await CheckAuthAsync(reqData.ID, null, reqData.PW);

	if (메모리DB_인증성공 == null)
	{
		var dbResult = await Task.Run(() => GetUserAuth(reqData.ID, hashPW));

		if (dbResult == null)
		{
			responseResult.Result = ERROR_CODE.AUTH_FAIL_ID_PW;
			return responseResult;
		}

		var dbUserData = await Task.Run(() => GetMainData(dbResult.UserIndex));

		SaveUserAuthInfo(ref responseResult, reqData, dbResult, dbUserData);

		return responseResult;
	}

	return responseResult;
}