如何在react native中从firebase身份验证中检索用户数据？

export default {
  apiKey: "YOUR_API_KEY",
  authDomain: "YOUR_AUTH_DOMAIN",
  databaseURL: "YOUR_DATABASE_URL",
  projectId: "YOUR_PROJECT_ID",
  storageBucket: "YOUR_STORAGE_BUCKET",
  messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
  appId: "YOUR_APP_ID",
};

import firebase from 'firebase';
import firebaseConfig from './firebaseConfig';

firebase.initializeApp(firebaseConfig);

firebase.auth().signInWithEmailAndPassword(email, password)
  .then(() => {
    firebase.auth().onAuthStateChanged((user) => {
      if (user) {
        // 用户已登录，可以获取用户数据
        const uid = user.uid;
        // 使用uid获取用户数据的逻辑
      } else {
        // 用户未登录
      }
    });
  })
  .catch((error) => {
    // 处理登录错误
  });

const userRef = firebase.database().ref(`users/${uid}`);
userRef.on('value', (snapshot) => {
  const userData = snapshot.val();
  // 处理用户数据
});