public IActionResult AddUser(UserDetail ud)
 {
     if (HttpContext.Session.GetString("AdminID") != null)
     {
         string     error = "";
         UserMethod um    = new UserMethod();
         um.InsertUser(ud, out error);
         return(RedirectToAction("AllUsers"));
     }
     else
     {
         return(RedirectToAction("AdminLogin"));
     }
 }