sdk-for-flutter/docs/examples/messaging/delete-subscriber.md

import 'package:appwrite/appwrite.dart';

Client client = Client() .setEndpoint('https://.cloud.appwrite.io/v1') // Your API Endpoint .setProject('<YOUR_PROJECT_ID>'); // Your project ID

Messaging messaging = Messaging(client);

await messaging.deleteSubscriber( topicId: '<TOPIC_ID>', subscriberId: '<SUBSCRIBER_ID>', );