render method
Pre-renders the reCAPTCHA widget on the page.
Returns a Future that resolves with the reCAPTCHA widget ID.
If you do not pre-render the widget, it will be rendered before the sign-in request is called. Depending on the network connection speed, this may cause a small delay before the widget is displayed.
Implementation
Future<int> render() async {
throw UnimplementedError('render() is not implemented');
}