verifyWithRecaptcha method
Implementation
Future<String> verifyWithRecaptcha(FirebaseAuth auth) {
var url = FirebaseAppAuthHandler.createAuthHandlerUrl(
app: auth.app,
authType: 'verifyApp',
);
var installation = FirebaseImplementation.installation;
var launchUrl = (installation as BaseFirebaseImplementation).launchUrl;
launchUrl(url);
return getVerifyResult(auth.app);
}