v12.6.0 Cloud Function Authentication Triggers - no longer working

[simeon9696]

[REQUIRED] Step 2: Describe your environment

• Operating System version: OS Name Microsoft Windows 11 Home Version 10.0.22631 Build 22631
• Firebase SDK version: _____
• Firebase Product: cloud functions (auth, database, storage, etc)
• Node.js version: 20
• NPM version: 10.8.2

[REQUIRED] Step 3: Describe the problem

The documentation for the auth triggers is no longer valid
https://firebase.google.com/docs/auth/extend-with-functions

src/onUserCreated.ts:8:45 - error TS2339: Property 'user' does not exist on type '(app?: App | undefined) => Auth'.

8 export const onUserCreated = functions.auth.user().onCreate((user:any) => { 

Steps to reproduce:

Using v12.6 of the firebase-functions package the below trigger is invalid:

// The Cloud Functions for Firebase SDK to create Cloud Functions and set up triggers.
import * as functions from 'firebase-functions';
// Start writing functions
// https://firebase.google.com/docs/functions/typescript

export const onUserCreated = functions.auth.user().onCreate((user:any) => {
 //TODO: Create avatar on user create and send verification email
  console.info(new Date())
  console.info(user)
});

I am currently refactoring to use a blocking function - only because the project is new and I can afford to do this

// The Cloud Functions for Firebase SDK to create Cloud Functions and set up triggers.
import {
  beforeUserCreated,
} from "firebase-functions/v2/identity";
// Start writing functions
// https://firebase.google.com/docs/functions/typescript

export const onUserCreated = beforeUserCreated((event:any) => {
  //TODO: Create avatar on user create and send verification email
  console.info(new Date())
  console.info(event)
});

What happened? How can we make the problem occur?
Run firebase init and try to set up a cloud function with an auth trigger as described in the documentation.

Relevant Code:

package.json

{
  "name": "functions",
  "scripts": {
    "lint": "eslint --ext .js,.ts .",
    "build": "tsc",
    "build:watch": "tsc --watch",
    "serve": "npm run build && firebase emulators:start --only functions",
    "shell": "npm run build && firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "engines": {
    "node": "20"
  },
  "main": "lib/index.js",
  "dependencies": {
    "firebase-admin": "^12.6.0",
    "firebase-functions": "^6.0.1"
  },
  "devDependencies": {
    "@typescript-eslint/eslint-plugin": "^5.12.0",
    "@typescript-eslint/parser": "^5.12.0",
    "eslint": "^8.9.0",
    "eslint-config-google": "^0.14.0",
    "eslint-plugin-import": "^2.25.4",
    "firebase-functions-test": "^3.1.0",
    "typescript": "^4.9.0"
  },
  "private": true
}

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[simeon9696]

Used //@ts-expect-error and it cleared away - not sure what's the issue there

// The Cloud Functions for Firebase SDK to create Cloud Functions and set up triggers.
import * as functions from 'firebase-functions';
// Start writing functions
// https://firebase.google.com/docs/functions/typescript

//@ts-expect-error
export const onUserCreated = functions.auth.user().onCreate((user:any) => {
 //TODO: Create avatar on user create and send verification email
  console.info(new Date())
  console.info(user)
});

[simeon9696]

That has just led to this error:

TypeError: Cannot read properties of undefined (reading 'user')

[simeon9696]

Found a fix here:
firebase/firebase-functions#1622 (comment)

const functions = require('firebase-functions/v1');

or

import functions from 'firebase-functions/v1'

Please update the documentation! That's a breaking change