public JsonResult FacebookLogin(FacebookLoginModel model)
        {
            Session["uid"] = model.uid;
            Session["accessToken"] = model.accessToken;

            return Json(new { success = true });
        }
 public ActionResult Index( string username)
 {
     if (Session["Member"] != null)
     {
         Session["Account"] = db.tbl_Account.Where(e => e.Username == username);
     }
     else
     {
         return RedirectToAction("Index", "TrangChu");
     }
     FacebookLoginModel f = new FacebookLoginModel();
     return View(f);
 }