Login=>Authorize API doesnt work

Am using Upstox API for the first time and tried using Postman.
Expected response(Sample) is https://<redirect_uri>?code=mk404x&state=XX56849
But response has this message. “You need to enable JavaScript to run this app.”
I tried changing the redirect_uri but the response is the same.
Please guide how to fix this.

Generating an auth code and generating accessing tokens using the auth code is a three-step process. The first two steps must be completed in a web browser:

  1. Perform Authentication: Access detailed instructions at Perform Authentication .
  2. Receive Auth Code: For this step, visit Receive Auth Code .
  3. Generate Access Token: Finally, to generate the access token, refer to Generate Access Token .

As first two steps require web browser, so please access the provided URL via a browser