Assign user to a group via API

This is for one of my client.
We are able to create a user (passing email as parameter) using API
https://accounts.zoho.com//accounts/feeds//v1/domainname.com/user

From the API documentation i uderstand that we can also manage these users using the fetch / update operations.

Is it possible to assign a user to a specific group, via api.
Eg:
the admin console already has groups

Trainee
Instructor
Coordinator

When a certain user is created, we would like to assign this user to any one of these groups
Is it possible to do via API ?
How is it done ?

Any help is great help
Thank you
Best Regards
Deepa Govind

-Deepa Govind

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