logout method
Implementation
Future<String> logout() {
Completer<String> completer = Completer();
GooglePlusApi.logout(allowInterop((String result) => completer.complete(result)));
return completer.future;
}
Future<String> logout() {
Completer<String> completer = Completer();
GooglePlusApi.logout(allowInterop((String result) => completer.complete(result)));
return completer.future;
}