sending signed request to API Gateway of custom domain name

apigw-signed-req.js

var AWS  = require('aws-sdk');
var rp   = require('request-promise')
var aws4 = require('aws4')

AWS.CredentialProviderChain.defaultProviders = [
  function () { return new AWS.EnvironmentCredentials('AWS'); },
  function () { return new AWS.EnvironmentCredentials('AMAZON'); },
  function () { return new AWS.SharedIniFileCredentials({profile: 'my_profile_name'}); },
  function () { return new AWS.EC2MetadataCredentials(); }
]

var chain = new AWS.CredentialProviderChain();


chain.resolve((err, cred)=>{
	AWS.config.credentials = cred;
});

AWS.config.update({region: 'us-west-2' });

var opts = {
	host: '<my_custom_api_gateway_domain_name>', 
	path: '/required-auth',
	uri: 'https://<my_custom_api_gateway_domain_name>/required-auth',
	json: true,
	headers: {}
}

opts.region = 'us-west-2'
opts.service = 'execute-api'
var signer  = new aws4.RequestSigner(opts, cred)

signer.sign()
//console.log(opts)

rp(opts)
.then( (html)=> console.log( html ) )
.catch( (e)=> console.log('failed:'+e))

hey i dont know code but need this added to my javascript can anyone help me im willing to pay contact me [email protected]