public HttpCookie CreateFormsAuthenticationCookie(OpenIdUser user)
        {
            var ticket = new FormsAuthenticationTicket(1, user.Nickname, DateTime.Now, DateTime.Now.AddDays(7), true, user.ToString());
            var encrypted = FormsAuthentication.Encrypt(ticket).ToString();
            var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encrypted);

            return cookie;
        }