I'm trying to generate access token for using the webinar "Add a webinar registrant" API

I want to generate access token OAuth 2.0 for “Add a webinar registrant” API , but when I try to get the access token from the OAuth 2.0 , it returns the raw HTMLS of Sign In Zoom.
In the postman , when I try I just want to know where to get the code and authorization_code .Where to find it ?

Hi @Dhanasekar
Thanks for reaching out to us and welcome to our Zoom Developer Community!
Here is a helpful thread on how to generate oauth tokens using Postman