sdk-for-dart/docs/examples/messaging/delete-topic.md

import 'package:dart_appwrite/dart_appwrite.dart';

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

Messaging messaging = Messaging(client);

await messaging.deleteTopic( topicId: '<TOPIC_ID>', );