public async Task <ActionResult> Autenticar([Bind] UtilizadorDto user)
        {
            var client   = new HttpClient();
            var response = await client.PostAsync(new Uri("http://localhost:5001/api/Utilizadores/autenticar"), new StringContent(user.ToString())
                                                  );

            var u = await response.Content.ReadAsAsync <Utilizador>();

            if (u == null)
            {
                return(View("Autenticar"));
            }

            return(RedirectToAction("Index", "Home"));
        }