public ActionResult Login(LoginModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                return LoginAndRedirect(model, returnUrl);
            }

            return View();
        }
        private ActionResult LoginAndRedirect(LoginModel model, string returnUrl)
        {
            AuthorizationInfoDTO authorizationInfoDTO;

            string tokenString = Request.QueryString["token"];

            if (string.IsNullOrEmpty(tokenString) == false)
            {
                authorizationInfoDTO = AASWrapper.GetAuthorizationDataFromToken(tokenString);
            }
            else
                authorizationInfoDTO = AASWrapper.Authenticate(model.AccountDO.UserName, model.AccountDO.Password);

            if (authorizationInfoDTO != null)
            {
                EmptySession();
                Session.Add(Entegral.AuAz.Constants.SESSIONKEY_AUAZ_AUTHORIZATION_INFO, authorizationInfoDTO);


                HttpCookie formsAuthenticationTicketCookie = Entegral.AuAz.Utils.GetFormsAuthenticationCookie(authorizationInfoDTO);
                Response.Cookies.Add(formsAuthenticationTicketCookie);


                if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/") && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                {
                    return Redirect(returnUrl);
                }
                else
                {
                    return RedirectToAction("Index", "Home");
                }
            }
            else
            {
                ModelState.AddModelError("LogonError", "Giriş başarısız. Lütfen tekrar deneyin...");
            }

            return View();
        }