OAuth2 machine credential using JavaScript

// m2m-oauth-example.js uses the Qlik Platform SDK with node.js to make an
// authenticated connection to Qlik as a non-interactive user.
// To use this example, create an OAuth2 web configuration in Qlik Cloud and set
// the Allow Machine-to-Machine option.
// Copy the clientId and clientSecret to a secure location, then set the consent
// to trusted.

// This example is written for Node.js using common.js for module use.

// Note if using < Node.js 18.x
// install node-fetch package and
// use the code below to add node-fetch to the global.fetch of the code.
// global.fetch = (...args) => import('node-fetch')
//  .then(({default: fetch}) => fetch(...args));

import { Auth, AuthType, Apps } from '@qlik/sdk';

const auth = new Auth({
  authType: AuthType.OAuth2,
  host: "<tenant-hostname.region.qlikcloud.com>",
  clientId: "<client id from OAuth2 configuration in Qlik Cloud>",
  clientSecret: "<client secret from OAuth2 configuration in Qlik Cloud>"
});

(async () => {
  await auth.authorize();
  let resp = await auth.rest('/users/me').then(output => output.json());
  console.log(resp);
  // get a list of applications
  resp = await auth.rest('/apps').then(output => output.json());
  // iterate through the resulting array and retrieve the app id and name
  resp.data.forEach((item) => {
    // console output to show the app information from the rest endpoint
    console.log(`${item.attributes.id} - ${item.attributes.name}`);
  });
  const apps = new Apps(auth);
  // get the reference to the first app returned in the list
  let app = await apps.get(resp.data[0].attributes.id);

  // open the app
  await app.open();

  // get the app layout
  let appLayout = await app.getAppLayout();
  // console output from the Qlik Analytics Engine containing app metadata
  console.log(appLayout);
});

Read the tutorial