asp.net core user registration with email confirmation

Question

I am trying to add email confirmation to user registration. I 've done the following so far

 

Added to Register.cshtml.cs 

var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
                        code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));

                        var callbackUrl = Url.Page("/Account/ConfirmEmail",
                            pageHandler: null,
                            values: new { area = "Identity", userId = user.Id, code = code, returnUrl = returnUrl },
                            protocol: Request.Scheme);

                        await _emailSender.SendEmailAsync(Input.Email, "Confirm your email",
                            $"Please confirm your account by <a href='{HtmlEncoder.Default.Encode(callbackUrl)}'>clicking here</a>.");

 Create a Services folder and class EmailServices.cs

 

using MailKit.Net.Smtp;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;
using MimeKit;
using System;
using System.Threading.Tasks;
using RoSafety.Services;

namespace RoSafety.Services
{
    public interface IMailer
    {
        Task SendEmailAsync(string email, string subject, string body);
    }

    public class Mailer : IMailer
    {
        private readonly SmtpSettings _smtpSettings;
        private readonly IWebHostEnvironment _env;

        public Mailer(IOptions<SmtpSettings> smtpSettings, IWebHostEnvironment env)
        {
            _smtpSettings = smtpSettings.Value;
            _env = env;
        }

        public async Task SendEmailAsync(string email, string subject, string body)
        {
            try
            {
                var message = new MimeMessage();
                message.From.Add(new MailboxAddress(_smtpSettings.SenderName, _smtpSettings.SenderEmail));
                message.To.Add(new MailboxAddress(email));
                message.Subject = subject;
                message.Body = new TextPart("html")
                {
                    Text = body
                };

                using (var client = new SmtpClient())
                {
                    client.ServerCertificateValidationCallback = (s, c, h, e) => true;

                    if (_env.IsDevelopment())
                    {
                        await client.ConnectAsync(_smtpSettings.Server, _smtpSettings.Port, true);
                    }
                    else
                    {
                        await client.ConnectAsync(_smtpSettings.Server);
                    }

                    await client.AuthenticateAsync(_smtpSettings.UserName, _smtpSettings.Password);
                    await client.SendAsync(message);
                    await client.DisconnectAsync(true);
                }
            }
            catch (Exception e)
            {
                throw new InvalidOperationException(e.Message);
            }
        }
    }
    public class SmtpSettings
    {
        public string Server { get; set; }
        public int Port { get; set; }
        public string SenderName { get; set; }
        public string SenderEmail { get; set; }
        public string UserName { get; set; }
        public string Password { get; set; }
    }
}

added smtp settings to json

 

"SmtpSettings": {
    "Server": "smtp.gmail.com",
    "Port": 587,
    "SenderName": "admin",
    "SenderEmail": "[email protected]",
    "UserName": "[email protected]",
    "Password": "password"
  },

and startup

 

services.AddIdentity<UserDataClass, UserRoleClass>(options =>
            {
                options.SignIn.RequireConfirmedAccount = true;
                options.User.RequireUniqueEmail = true;
                options.Password.RequiredLength = 8;
                options.Password.RequireDigit = true;
                options.Password.RequireUppercase = true;

            })
                .AddDefaultUI()
                .AddRoles<UserRoleClass>()
                .AddDefaultTokenProviders()
                .AddEntityFrameworkStores<ApplicationDbContext>();


            services.Configure<SmtpSettings>(Configuration.GetSection("SmtpSettings"));
            services.AddSingleton<IMailer, Mailer>();

but a new account is still automatically confirmed and I don't receive email for confirmation. Can anybody see what is wrong please?