// GET: Home Page Options
        public IActionResult CreatePersonalTrainerView()
        {
            CreatePersonalTrainerViewModel createPersonalTrainerViewModel = new CreatePersonalTrainerViewModel()
            {
                IdentityUser     = new Microsoft.AspNetCore.Identity.IdentityUser(),
                PersonalTrainer  = new PersonalTrainer(),
                IdentityUserRole = new IdentityUserRole <string>()
            };

            return(View());
        }
        public async Task <IActionResult> CreatePersonalTrainerView(CreatePersonalTrainerViewModel model, IdentityUser identityUser)
        {
            if (ModelState.IsValid)
            {
                Guid guid   = Guid.NewGuid();
                var  hasher = new PasswordHasher <IdentityUser>();
                var  role   = _context.Roles.Where(r => r.Name == "Personal Trainer").FirstOrDefault();

                identityUser = new Microsoft.AspNetCore.Identity.IdentityUser
                {
                    Id                 = guid.ToString(),
                    Email              = model.IdentityUser.Email,
                    UserName           = model.IdentityUser.Email,
                    NormalizedEmail    = model.IdentityUser.Email.ToUpper(),
                    NormalizedUserName = model.IdentityUser.Email.ToUpper(),
                    PasswordHash       = hasher.HashPassword(null, model.IdentityUser.PasswordHash)
                };

                PersonalTrainer personalTrainer = new PersonalTrainer
                {
                    UserId    = guid.ToString(),
                    FirstName = model.PersonalTrainer.FirstName,
                    LastName  = model.PersonalTrainer.LastName
                };

                IdentityUserRole <string> identityUserRole = new Microsoft.AspNetCore.Identity.IdentityUserRole <string>
                {
                    UserId = guid.ToString(),
                    RoleId = role.Id
                };

                _context.Add(identityUserRole);
                _context.Add(identityUser);
                _context.Add(personalTrainer);
                await _context.SaveChangesAsync();

                return(View("Home"));
            }
            ;

            ViewData["UserId"] = new SelectList(_context.PersonalTrainers, "Id", "Id", model.PersonalTrainer.UserId);
            return(View());
        }