public IActionResult OnPost()
 {
     if (ModelState.IsValid)
     {
         db.User.Add(NewUser);
         db.SaveChanges();
         return(RedirectToPage("/User"));
     }
     return(Page());
 }
 public IActionResult OnPost()
 {
     using (var db = new SpartaDatabase())
     {
         if (ModelState.IsValid)
         {
             db.User.Add(NewUser);
             db.SaveChanges();
             return(RedirectToPage("/User"));
         }
     }
     return(Page());
 }