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

[elisa.zoom (Elisa)]

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

Guide: Making a Zoom API Call with OAuth Credentials in Postman

To publish an app on the Zoom Marketplace you must create an OAuth app. When you’re ready to test making API calls, download the latest version of Postman and import the Zoom API collections following the steps outlined here. There are Three Ways to Set up OAuth in Postman to Make API Requests We’re going to go through three ways to set up our OAuth application credentials to successfully authorize and access the Zoom API to make requests. The “Easy” Difficulty OAuth 2.0 Set Up in Postman We’…