Node.js file upload on Stamplay

upload.js

'use strict';

const request = require('request');
const fs = require('fs');

var formData = {
  image: fs.createReadStream(__dirname + '/claudio.jpg'),
};

request.post({
  url: 'https://appId.stamplayapp.com/api/cobject/v1/myobject',
  formData: formData
}, function optionalCallback(err, httpResponse, body) {
  if (err) {
    return console.error('upload failed:', err);
  }
  if (httpResponse.statusCode != 200) {
    return console.error('upload failed', body)
  }
  console.log('Upload successful!  Server responded with:', body);
});