The snippet to show whats the wrong code looks like

ow_promise_blog_notworking.js

'use strict';
const gmap = require('@google/maps');

function location(params) {
  const latlng = JSON.parse(JSON.stringify(params.coords))
  const gmapClient = gmap.createClient({
    key: process.env.GOOGLE_MAPS_API_KEY
  })
  gmapClient.reverseGeocode({
    "latlng": latlng,
    "result_type": "postal_code"
  },function(function(results, status){
   if (status === 'OK'){
     return {status: 'Err',location: response.json.results[0].formatted_address}
   }else{
      return {status: status,location: 'Unknown'}
   }
  })
  return {status: status,location: 'Unknown'}
}

global.main = location;