I want to get my individual account’s networkurl and customportalId to use in this API:

https://learn.zoho.com/learn/api/v1/portal/<networkurl>/customportal/<customportalId>/manual

How can I retrieve the networkurl and customportalId using the API?

I have referred to this document, but I didn’t get any idea:
https://www.zoho.com/learn/api/get-list-of-manuals-shared-to-custom-portal.html

Please, can anyone help me?