如何在firestore flutter provider中从数据库中收集数据时初始化类

dependencies:
  flutter:
    sdk: flutter
  cloud_firestore: ^2.5.3
  provider: ^6.0.1

class User {
  final String id;
  final String name;

  User({required this.id, required this.name});
}

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/foundation.dart';

class UserProvider extends ChangeNotifier {
  List<User> _users = [];

  List<User> get users => _users;

  Future<void> fetchUsers() async {
    try {
      final snapshot = await FirebaseFirestore.instance.collection('users').get();
      _users = snapshot.docs.map((doc) => User(id: doc['id'], name: doc['name'])).toList();
      notifyListeners();
    } catch (error) {
      print(error);
    }
  }
}

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider(
      create: (context) => UserProvider(),
      child: MaterialApp(
        title: 'Firestore Flutter Provider',
        home: HomePage(),
      ),
    );
  }
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final userProvider = Provider.of<UserProvider>(context);
    return Scaffold(
      appBar: AppBar(
        title: Text('Firestore Flutter Provider'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            userProvider.fetchUsers();
          },
          child: Text('Fetch Users'),
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class UserListPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final userProvider = Provider.of<UserProvider>(context);
    final users = userProvider.users;

    return Scaffold(
      appBar: AppBar(
        title: Text('User List'),
      ),
      body: ListView.builder(
        itemCount: users.length,
        itemBuilder: (context, index) {
          final user = users[index];
          return ListTile(
            title: Text(user.name),
          );
        },
      ),
    );
  }
}