Click API 401

I am following this code sample and kept running into many errors.

One of the error was that it could not find body so realized to use 

const result = await accountApi.createClickwrap(accountId, clickwrapRequest);

 instead of the following as given in code base

const result = await accountApi.createClickwrap(accountId, { clickwrapRequest });

But now I am stuck at 401 error, unable to understand the error at all.
 

{
  statusCode: 401,
  header: Object [AxiosHeaders] {
    'cache-control': 'no-cache',
    'x-docusign-tracetoken': '86….,
    'x-docusign-node': 'DA...',
    'strict-transport-security': 'max-age=31536000; includeSubDomains; preload',
    date: 'Thu, 23 Jan 2025 19:04:23 GMT',
    'content-length': '0',
    'set-cookie': [
      'BIGipServerpool_Demo_API_Click=!SQ…..=; path=/; Httponly; Secure'
    ]
  },
  body: ''
}

I am adding fresh access token:

//DOCUSIGN_CLICK_API_BASE_PATH="https://demo.docusign.net/clickapi"

const docusignClick = require("docusign-click");

...
 this.dsApiClient = new docusignClick.ApiClient();
...

this.dsApiClient.setBasePath(process.env.DOCUSIGN_CLICK_API_BASE_PATH);
console.log('Access token: ', req.session.access_token)
this.dsApiClient.addDefaultHeader('Authorization', 'Bearer ' + req.session.access_token); 

What am I doing wrong? Do let me know if you need more information.