How do i solve this type error?

  //Create
        [HttpPost]
        public async Task<IActionResult> Create(AddPollRequest addPollRequest)
        {
            var result = await HttpContext.AuthenticateAsync(
                 CookieAuthenticationDefaults.AuthenticationScheme
              );


            addPollRequest.UserId = await UserInformation.GetGoogleId(result); <-- this line

            var domainPoll = mapper.Map<Poll>(addPollRequest);
            await pollRepository.CreatePollAsync(domainPoll);
            return RedirectToAction("Index", "Home");

        }