public async Task <IActionResult> Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                var user = await userManager.FindByNameAsync(model.UserName);

                if (user == null)
                {
                    user = new StudentHousingUser
                    {
                        Id          = Guid.NewGuid().ToString(),
                        UserName    = model.UserName,
                        FirstName   = model.FirstName,
                        LastName    = model.LastName,
                        Email       = model.Email,
                        PhoneNumber = model.PhoneNumber
                    };
                }
                //if (userManager.FindByIdAsync(user.Id) != null)
                //{
                //    ModelState.AddModelError("", "Username or e-mail already registered. Try logging in.");
                //    return View(model);
                //}
                var result = await userManager.CreateAsync(user, model.Password);

                if (result.Succeeded)
                {
                    var token = await userManager.GenerateEmailConfirmationTokenAsync(user);

                    var confirmationEmail = Url.Action("ConfirmEmailAddress", "Account",
                                                       new { token = token, email = user.Email }, Request.Scheme);



                    EmailConfirmation(user, confirmationEmail);
                    ViewBag.message = "<h3>An e-mail was sent to your e-mail address with the confirmation link to register to the website. Please check your e-mail and open the link.</h3>";
                    ViewBag.title   = "Check e-mail";
                    return(View("Message"));
                }
                else
                {
                    foreach (var error in result.Errors)
                    {
                        ModelState.AddModelError("", error.Description);
                    }

                    return(View());
                }
            }

            return(View(model));
        }
        private void EmailConfirmation(StudentHousingUser user, string confirmationEmail)
        {
            var message = new MimeMessage();

            message.From.Add(new MailboxAddress("Student Housing", "*****@*****.**"));
            message.To.Add(new MailboxAddress(user.FirstName + " " + user.LastName, user.Email));
            message.Subject = "E-mail Confirmation - DO NOT REPLY";
            message.Body    = new TextPart("plain")
            {
                Text = "Thank you for registering in the Student Housing website. Please confirm your registration by clicking on this link: " + confirmationEmail
            };

            SendEmail(message);
        }