Firebase用户返回已注册用户的空元数据

firebase.auth().onAuthStateChanged(user => {
  if (user) {
    // 用户已登录，获取元数据
    user.getIdTokenResult(true).then(idTokenResult => {
      console.log(idTokenResult.claims); // 这里可以获取到用户的元数据
    }).catch(error => {
      console.error('Error getting ID token result:', error);
    });
  } else {
    // 用户未登录
    console.log('No user is signed in.');
  }
});

const admin = require('firebase-admin');
admin.initializeApp();

const uid = '用户的UID';
const additionalClaims = {
  premiumAccount: true,
  // 其他自定义声明
};

admin.auth().setCustomUserClaims(uid, additionalClaims)
  .then(() => {
    console.log('Custom claims updated successfully.');
  })
  .catch((error) => {
    console.error('Error updating custom claims:', error);
  });

user.getIdToken(true).then(idToken => {
  console.log('ID token:', idToken);
}).catch(error => {
  console.error('Error refreshing ID token:', error);
});