public async Task <bool> Testfor_GetUserById()
        {
            //Arrange
            var res = false;

            //Action
            serviceUser.Setup(repo => repo.Register(_user)).ReturnsAsync(_user);
            var result = await _interviewUserTS.Register(_user);

            serviceUser.Setup(repos => repos.GetUserById(result.UserId)).ReturnsAsync(_user);
            var resultUser = await _interviewUserTS.GetUserById(result.UserId);

            //Assertion
            if (resultUser != null)
            {
                res = true;
            }
            //Assert
            //final result displaying in text file
            File.AppendAllText("../../../output_revised.txt", "Testfor_GetUserById=" + res + "\n");
            return(res);
        }