private void ContentDialog_SecondaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
        {
            string login = Username.Text;
            string pass  = Password.Password;

            if (string.IsNullOrWhiteSpace(login) || string.IsNullOrWhiteSpace(pass))
            {
                args.Cancel           = true;
                ErrorLabel.Content    = "You haven't filled all required fields.";
                ErrorLabel.Visibility = Visibility.Visible;
            }
            else
            {
                Task.Run(async() =>
                {
                    ObjectResult <LoginContent> result = await WebWrapper.Login(login.Trim(), pass, ApiUrl);
                    if (result != null && result.code == 1 && result.content?.privileges >= 0)
                    {
                        Settings.Default.Username = login.Trim();
                        Settings.Default.Password = Utils.PasswordEncryptor.Encrypt(pass, login.Trim());
                        Settings.Default.Save();
                        App.Token = result.content.token;
                        switch (Invoker)
                        {
                        case 0:
                            PM.DownloadDependencies();
                            break;

                        case 1:
                            PM.CheckUpdates();
                            break;
                        }
                    }
                    else
                    {
                        args.Cancel = true;

                        new Task(() =>
                        {
                            Dispatcher.Invoke(() =>
                            {
                                ErrorLabel.Content    = result.message;
                                ErrorLabel.Visibility = Visibility.Visible;
                            });
                        }).Start();
                    }
                }).Wait();
            }
        }