问Firebase:如何手动将Google登录验证器限制为特定的电子邮件地址？

EN

// Import the Cloud Auth Admin module.
const gcipCloudFunctions = require('gcip-cloud-functions');
// Initialize the Auth client.
const authClient = new gcipCloudFunctions.Auth();
// Http trigger with Cloud Functions.
exports.beforeCreate = authClient.functions().beforeCreateHandler((user, context) => {
  // If the user is authenticating within a tenant context, the tenant ID can be determined from
  // user.tenantId or from context.resource, eg. 'projects/project-id/tenant/tenant-id-1'
  // Only this one user can sign up.
  if (user.email !== 'user@acme.com') {
    throw new gcipCloudFunctions.https.HttpsError('invalid-argument', `Unauthorized email "${user.email}"`);
});