FirebaseError:缺少权限或权限不足。update或create

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null && auth.uid == request.resource.data.userId"
  }
}

firebase.auth().signInWithEmailAndPassword(email, password)
  .then((userCredential) => {
    // 用户已登录，可以进行数据操作
  })
  .catch((error) => {
    console.error("登录失败:", error);
  });

{
  "rules": {
    "users": {
      "$uid": {
        ".read": "$uid === auth.uid",
        ".write": "$uid === auth.uid"
      }
    }
  }
}

// 初始化 Firebase
const firebaseConfig = {
  apiKey: "YOUR_API_KEY",
  authDomain: "YOUR_PROJECT_ID.firebaseapp.com",
  databaseURL: "https://YOUR_PROJECT_ID.firebaseio.com",
  projectId: "YOUR_PROJECT_ID",
  storageBucket: "YOUR_PROJECT_ID.appspot.com",
  messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
  appId: "YOUR_APP_ID"
};

firebase.initializeApp(firebaseConfig);

// 用户登录
firebase.auth().signInWithEmailAndPassword(email, password)
  .then((userCredential) => {
    const user = userCredential.user;
    // 更新用户数据
    firebase.database().ref(`users/${user.uid}`).set({
      name: "John Doe",
      email: user.email
    }).then(() => {
      console.log("数据更新成功");
    }).catch((error) => {
      console.error("数据更新失败:", error);
    });
  })
  .catch((error) => {
    console.error("登录失败:", error);
  });