private async void WebBrowser_Navigating(object sender, NavigatingCancelEventArgs e)
{
var uri = e.Uri;
if (uri.ToString().StartsWith(OidcClient.Options.RedirectUri))
{
var code = OidcClient.GetCode(uri.Query);
var token = await _oidcClient.GetTokenAsync(code);
TokenFile.Write(token);
this.Close();
}
}