How to Synchronize Zoho Campaigns Contacts (API) with an External Database?

How to Synchronize Zoho Campaigns Contacts (API) with an External Database?

I am using the Zoho Campaigns API (https://www.zoho.com/campaigns/help/developers/list-management.html) to manage user subscriptions, including subscribing and unsubscribing users from lists or topics. I need to know how to retrieve a comprehensive list of all users, along with the specific lists and topics they are subscribed to, so that I can synchronize Zoho Campaigns Contacts with my external database. However, I couldn't find any information in the documentation about this details.

Is this feature supported by the API?