如何仅允许当前用户在Firebase中为新用户创建帐户

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

exports.createUserAccount = functions.https.onCall((data, context) => {
  // 验证当前用户的身份验证凭据
  if (!context.auth) {
    throw new functions.https.HttpsError('unauthenticated', '只有经过身份验证的用户才能创建新用户帐户。');
  }

  // 创建新用户帐户
  return admin.auth().createUser({
    email: data.email,
    password: data.password,
    displayName: data.displayName
  })
  .then((userRecord) => {
    // 返回创建的新用户帐户信息
    return {
      uid: userRecord.uid,
      email: userRecord.email,
      displayName: userRecord.displayName
    };
  })
  .catch((error) => {
    throw new functions.https.HttpsError('unknown', '创建新用户帐户时发生错误。', error);
  });
});

const createUserAccount = firebase.functions().httpsCallable('createUserAccount');

createUserAccount({ email: 'newuser@example.com', password: 'password123', displayName: 'New User' })
  .then((result) => {
    console.log('创建的新用户帐户信息：', result.data);
  })
  .catch((error) => {
    console.error('创建新用户帐户时发生错误：', error);
  });