Add file to deal in Pipedrive using node.js client

pipedrive-add-file-to-deal.js

'use strict';
var Pipedrive = require('pipedrive');
var pipedrive = new Pipedrive.Client(process.env.PIPEDRIVE_API_TOKEN, { strictMode: true });

var params = {
  "file_path": "/path/to/document.pdf",
  "deal_id": 1
};

pipedrive.Files.add(params, (err, f) => {
    if (err !== null) {
        callback(err);
    }
    console.log(`File has been added to ${params["deal_id"]}.`);
});