node-appwrite/docs/examples/messaging/create-fcm-provider.md

Appwrite is an open-source self-hosted backend server that abstract and simplify complex and repetitive development tasks behind a very simple REST API

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.createFcmProvider(
    '<PROVIDER_ID>', // providerId
    '<NAME>', // name
    {}, // serviceAccountJSON (optional)
    false // enabled (optional)
);