public async Task<JsonResult> Login(LoginViewModel loginModel, string returnUrl = "")
        {
            CheckModelState();

            var loginResult = await GetLoginResultAsync(
                loginModel.UsernameOrEmailAddress,
                loginModel.Password,
                loginModel.TenancyName
                );

            await SignInAsync(loginResult.User, loginResult.Identity, loginModel.RememberMe);

            if (string.IsNullOrWhiteSpace(returnUrl))
            {
                returnUrl = Request.ApplicationPath;
            }

            return Json(new MvcAjaxResponse { TargetUrl = returnUrl });
        }
        public async Task<JsonResult> Login(LoginViewModel loginModel, string returnUrl = "")
        {
            if (!ModelState.IsValid)
            {
                throw new UserFriendlyException("Your form is invalid!");
            }

            var loginResult = await _userManager.LoginAsync(
                loginModel.UsernameOrEmailAddress,
                loginModel.Password,
                loginModel.TenancyName
                );

            switch (loginResult.Result)
            {
                case AbpLoginResultType.Success:
                    break;
                case AbpLoginResultType.InvalidUserNameOrEmailAddress:
                case AbpLoginResultType.InvalidPassword:
                    throw new UserFriendlyException("Invalid user name or password!");
                case AbpLoginResultType.InvalidTenancyName:
                    throw new UserFriendlyException("No tenant with name: " + loginModel.TenancyName);
                case AbpLoginResultType.TenantIsNotActive:
                    throw new UserFriendlyException("Tenant is not active: " + loginModel.TenancyName);
                case AbpLoginResultType.UserIsNotActive:
                    throw new UserFriendlyException("User is not active: " + loginModel.UsernameOrEmailAddress);
                case AbpLoginResultType.UserEmailIsNotConfirmed:
                    throw new UserFriendlyException("Your email address is not confirmed!");
                default: //Can not fall to default for now. But other result types can be added in the future and we may forget to handle it
                    throw new UserFriendlyException("Unknown problem with login: " + loginResult.Result);
            }

            AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie);
            AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = loginModel.RememberMe }, loginResult.Identity);

            if (string.IsNullOrWhiteSpace(returnUrl))
            {
                returnUrl = Request.ApplicationPath;
            }

            return Json(new MvcAjaxResponse { TargetUrl = returnUrl });
        }