public ActionResult SignIn(string email, string password)
        {
            KoombuBll kBll = new KoombuBll();
            var       user = kBll.SignIn(email, password);

            if (user != null)
            {
                Session["UserName"] = user.FirstName + " " + user.LastName;
                Session["UserId"]   = user.UserId;
                if (user.ProfilPicture != null)
                {
                    Session["UserPic"] = user.ProfilPicture;
                }
                else
                {
                    Session["UserPic"] = "~/Content/images/user.png";
                }
                return(RedirectToAction("Home"));
            }

            ViewData["SignError"] = "true";
            return(View("Index"));
        }