Create user webhook which should send request to my backend throw an error

const request = require('request');

module.exports = function (user, context, cb) {
  console.log('webhook was started for ' +{ 
  url: '', 
  body: {
  "firstName": user.username,
  "phone": user.phoneNumber
  json: true,
  headers : {
      "content-type": "application/json"
  function(error, response, body) { 
    console.log('-----', user);
    cb(error, response) 

I wrote webhook for “Create user” case
But, when I create a user, I see:
Access to XMLHttpRequest at ‘’ from origin ‘’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
When I send the same request via Postman -> works fine