dotenv not working on mac code example

Example 1: node dotenv

require('dotenv').config();

console.log(process.env.MY_ENV_VAR);

Example 2: .env file vars nto defined in child directory

const ck = require('ckey');

const userName = ck.USER;     // sample@gmail.com
const password = ck.PASSWORD; // iampassword123
const apiKey   = ck.API_KEY;  // 1234567890