main.dart

import 'package:flutter/material.dart';
import 'package:flutter_desktop_chat_app/responsive_builder.dart';
import 'package:stream_chat_flutter/stream_chat_flutter.dart';


//Before  
void main() {
  runApp(MyApp());
}

//----------------------------

//After
Future<void> main() async {
//Step 1
  final client = StreamChatClient(
    'YOUR-KEY',
    logLevel: Level._INFO_,
  );

//Step 2
  await client.connectUser(
    User(
      id: 'Harry',
      extraData: {
        'image': 'https://picsum.photos/id/1005/200/300',
      },
    ),
    client.devToken('Harry'),
  );
  runApp(MyApp(
    client: client,
  ));
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.     const MyApp({Key key, this.client}) : super(key: key);     final StreamChatClient client;
  @override
  Widget build(BuildContext context) {
    // Step 3
    return StreamChat(
      client: client,
      child: MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors._blue_,
        ),
        home: MyHomePage(title: 'Flutter Demo Home Page'),
      ),
    );
  }
}