const sdk = require('node-appwrite');

const client = new sdk.Client()
    .setEndpoint('https://cloud.appwrite.io/v1') // Your API Endpoint
    .setProject('5df5acd0d48c2') // Your project ID
    .setKey('919c2d18fb5d4...a2ae413da83346ad2'); // Your secret API key

const messaging = new sdk.Messaging(client);

const result = await messaging.deleteTopic(
    '<TOPIC_ID>' // topicId
);