public IActionResult AllUsers()
        {
            if (HttpContext.Session.GetString("AdminID") != null)
            {
                List <UserDetail> userList = new List <UserDetail>();
                UserMethod        um       = new UserMethod();

                string error = "";

                userList = um.SelectUsers(out error);

                ViewBag.error = error;

                return(View(userList));
            }
            else
            {
                return(RedirectToAction("AdminLogin"));
            }
        }