Uncaught SyntaxError: Unexpected token ‘:’

I am having error when adding this code in my webpack.config.js Uncaught SyntaxError: Unexpected token ‘:’

const webpack = require('webpack');
const dotenv = require('dotenv');

dotenv.config();

module.exports = {
  //...
  plugins: [
    // ...
    new webpack.DefinePlugin({
       'process.env': JSON.stringify(process.env)
    })
    // ...
  ]
  //...
}

app.js

'use strict';
const dotenv = require('dotenv');
const config = dotenv.config();
const {API_KEYS} =config.parsed;

....

console.log("keys ",API_KEYS)

....