sdk-for-dart/docs/examples/avatars/get-browser.md

import 'package:dart_appwrite/dart_appwrite.dart';
import 'package:dart_appwrite/enums.dart' as enums;

Client client = Client()
    .setEndpoint('https://<REGION>.cloud.appwrite.io/v1') // Your API Endpoint
    .setProject('<YOUR_PROJECT_ID>') // Your project ID
    .setSession(''); // The user session to authenticate with

Avatars avatars = Avatars(client);

Uint8List result = await avatars.getBrowser(
    code: enums.Browser.avantBrowser,
    width: 0, // (optional)
    height: 0, // (optional)
    quality: -1, // (optional)
);