TypeError: Cannot read properties of null (reading 'length').

[mouadessalim]

I am trying to setup a firebase function with authentification trigger, i've followed the documentation but nothing work, i am using v1 functions because authentification trigger is not yet supported for v2. Here is my code :

//index.js
const functions = require("firebase-functions/v1");

const { initializeApp } = require("firebase-admin/app");
initializeApp();

exports.testFunction = functions.auth.user().onCreate((user) => {
 return console.log("Hello, World");
});

I am getting a TypeError: Cannot read properties of null (reading 'length') in my firebase-debug.log

The function seems to be packaged and uploaded successfully, but when creating the node.js function, it fails.

I am following this documentation : https://firebase.google.com/docs/functions/auth-events and this sample :

functions-samples/Node-1st-gen/quickstarts/email-users/functions/index.js

Line 45 in c4fde45

exports.sendWelcomeEmail = functions.auth.user().onCreate((user) => {

I've also tried multiple versions of firebase-functions and firebase-admin, here is my package.json :

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase emulators:start --only functions",
    "shell": "firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "engines": {
    "node": "22"
  },
  "main": "index.js",
  "dependencies": {
    "firebase-admin": "^13.2.0",
    "firebase-functions": "^6.3.2"
  },
  "private": true
}