public IActionResult ProcessAddTestUserForm(AddTestUserViewModel viewModel)
      {
          if (ModelState.IsValid)
          {
              TestUser theUser = new TestUser
              {
                  FirstName  = viewModel.FirstName,
                  LastName   = viewModel.LastName,
                  SchoolName = viewModel.SchoolName,
                  Emoji      = viewModel.Emoji,
              };

              context.Users.Add(theUser);
              context.SaveChanges();
              return(Redirect("index/"));
          }
          return(View(viewModel));
      }
      public IActionResult AddTestUser()
      {
          AddTestUserViewModel addTestUserViewModel = new AddTestUserViewModel();

          return(View(addTestUserViewModel));
      }