BookManager.Web.Controllers.AccountController.Login C# (CSharp) Метод

        public ActionResult Login(LoginViewModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                var user = Context.Users.Where(
                    u => u.Username.ToUpper() == model.Username.ToUpper()
                    && u.Password == model.Password)
                    .FirstOrDefault();
                if (user != null)
                {
                    var roles = user.Roles.Select(m => m.RoleName).ToArray();

                    CustomPrincipalSerializeModel serializeModel = new CustomPrincipalSerializeModel();
                    serializeModel.UserId = user.UserId;
                    serializeModel.UserName = user.Username;
                    serializeModel.roles = roles;

                    string userData = JsonConvert.SerializeObject(serializeModel);
                    FormsAuthenticationTicket authTicket = new FormsAuthenticationTicket(
                             1,
                             user.Username,
                             DateTime.Now,
                             DateTime.Now.AddMinutes(15),
                             false,
                             userData);

                    string encTicket = FormsAuthentication.Encrypt(authTicket);
                    HttpCookie faCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encTicket);
                    Response.Cookies.Add(faCookie);

                    if (roles.Contains("Admin"))
                    {
                        return RedirectToAction("Index", "Admin");
                    }
                    else
                    {
                        if (returnUrl == null)
                            return RedirectToAction("Index", "Books");
                        try
                        {
                            return Redirect(returnUrl);
                        }
                        catch
                        {
                            return RedirectToAction("Index", "Books");
                        }
                    }
                }

                ModelState.AddModelError("", "Incorrect username and/or password");
            }

            return View(model);
        }