Flutter用户注册到Firebase:添加额外的用户信息(年龄，用户名)

import 'package:firebase_auth/firebase_auth.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

Firebase.initializeApp();

Future<String> registerUser(String email, String password, int age, String username) async {
  try {
    UserCredential userCredential = await FirebaseAuth.instance.createUserWithEmailAndPassword(
      email: email,
      password: password,
    );
    String uid = userCredential.user.uid;
    
    // 添加额外的用户信息到Cloud Firestore
    await FirebaseFirestore.instance.collection('users').doc(uid).set({
      'age': age,
      'username': username,
    });
    
    return uid;
  } catch (e) {
    print('注册失败：$e');
    return null;
  }
}

String userId = await registerUser('example@example.com', 'password', 25, 'John');
if (userId != null) {
  print('注册成功，用户ID：$userId');
} else {
  print('注册失败');
}