如何在firebase函数中使用firebase.auth()？

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

const serviceAccount = require('./serviceAccountKey.json');

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
});

admin.auth().createUser({
  email: 'user@example.com',
  password: 'password',
})
  .then((userRecord) => {
    console.log('Successfully created new user:', userRecord.uid);
  })
  .catch((error) => {
    console.log('Error creating new user:', error);
  });

admin.auth().signInWithEmailAndPassword('user@example.com', 'password')
  .then((userCredential) => {
    console.log('Successfully signed in:', userCredential.user.uid);
  })
  .catch((error) => {
    console.log('Error signing in:', error);
  });

const idToken = '...'; // 用户令牌

admin.auth().verifyIdToken(idToken)
  .then((decodedToken) => {
    const uid = decodedToken.uid;
    console.log('Valid token. User ID:', uid);
  })
  .catch((error) => {
    console.log('Invalid token:', error);
  });