Be notified of new signups in your app using Firebase Authentication and Google Chat

Author: Mailmeteor (https://mailmeteor.com/)

Description: Get notified right into Google Chat of your new users recorded in Firebase Authentication.

Details: This extension posts a new message in Google Chat whenever a new user is recorded in your Firebase Authentication project.

You can configure the message and add additional information saved in the Firebase Authentication user record.

Here's a gist of how this extension works:

exports.sendSignupToGoogleChat = functions.auth.user().onCreate((user) => {
  const message = `🥳 New signup ${user.email || "(no email)"}`;

  return fetch(GOOGLE_CHAT_WEBHOOK_URL, {
    method: "POST",
    headers: { "Content-Type": "application/json; charset=UTF-8" },
    body: JSON.stringify({ text: message }),
  });
});

Additional Setup

Before installing this extension, make sure to retrieve the Google Chat Webhook URL of your space. The webhook URL is currently accessible only to Google Workspace accounts.

const GOOGLE_CHAT_WEBHOOK_URL = "https://chat.googleapis.com/v1/spaces/....";

Note from Firebase

Your Firebase project must be on the Blaze (pay-as-you-go) plan to install the extension. You will only be charged for the resources you use. Most Firebase services offer a free tier for low-volume use. Learn more about Firebase billing.

When installing or reconfiguring this extension, you will be billed a small amount (typically less than $0.10). See Cloud Functions under Firebase Pricing for a detailed explanation.