I am following this doc:
https://cloud.google.com/sql/docs/postgres/connect-instance-cloud-functions

The docs seem to be a bit off as there is no mention of creating a connector in the cloud function but its required.

I have it working with the helloworld example but when I try to connect to my AlloyDb and fetch users I get this error: Error: connect ECONNREFUSED 127.0.0.1:543

I set my env variables:

INSTANCE_UNIX_SOCKET : /cloudsql/{my-project-id}:us-east4:quickstart-instance 
DB_NAME: {db_name}
DB_USER: {db_user}
DB_PASS: {my_pwd}

I set my Runtime service account to my account with AlloyDb_Admin permissions

Here is my function:
-package.json

{
  "dependencies": {
   "@google-cloud/functions-framework": "^3.0.0",
   "knex": "3.1.0",
   "pg": "8.11.5"
 }
}

-index.js

const Knex = require('knex');

functions.http('getUsers', async (req, res) => {

    const createUnixSocketPool = async config => {

        return Knex({
            client: 'pg',
            connection: {
            user: process.env.DB_USER, // e.g. 'my-user'
            password: process.env.DB_PASS, // e.g. 'my-user-password'
            database: process.env.DB_NAME, // e.g. 'my-database'
            host: process.env.INSTANCE_UNIX_SOCKET, // e.g. '/cloudsql/project:region:instance'
            },
            ...config,
        });
    };

    const knex = await createUnixSocketPool()

    knex('users').select('*')
    .then(rows => {
        console.log(rows);
    })
    .catch(err => {
        console.error(err);
    });
}); 

Here is my network:

Here is my Connector Details:

Here is my firewall for default:

What might I be missing?