public async Task <IActionResult> OnPostAsync(string returnUrl = null)
        {
            var reCAPTCAResult = await _recaptchaService.VerifyResponse(Request.Form["g-recaptcha-response"].ToString());

            if (!reCAPTCAResult)
            {
                ModelState.AddModelError(string.Empty, "reCAPTCHA failed");
            }

            ReturnUrl = returnUrl;
            if (ModelState.IsValid)
            {
                var user = new ApplicationUser {
                    UserName   = Input.Email,
                    Email      = Input.Email,
                    FirstName  = Input.FirstName,
                    LastName   = Input.LastName,
                    IsHomeless = Input.IsHomeless,
                    Address    = Input.Address
                };

                var result = await _userManager.CreateAsync(user, Input.Password);

                if (result.Succeeded)
                {
                    _logger.LogInformation("User created a new account with password.");

                    var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);

                    var callbackUrl = Url.EmailConfirmationLink(user.Id, code, Request.Scheme);
                    await _emailSender.SendEmailConfirmationAsync(Input.Email, callbackUrl);

                    await _signInManager.SignInAsync(user, isPersistent : false);

                    return(LocalRedirect(Url.GetLocalUrl(returnUrl)));
                }
                foreach (var error in result.Errors)
                {
                    ModelState.AddModelError(string.Empty, error.Description);
                }
            }

            // If we got this far, something failed, redisplay form
            return(Page());
        }