openWebPage method
Called when the renew interaction uses an HTML web page.
You should present the URL in a Chrome Custom Tab and terminate the function when the web page is dismissed by the user.
Implementation
@override
Future<bool> openWebPage(Uri url) async {
if (await canLaunch(url.toString())) {
return launch(url.toString());
} else {
throw 'Could not launch $url';
}
}