API endpoint to remove a teammate’s inbox seat

Right now, seat removal can only be done in the UI. I’d like an API endpoint (PUT /admins/{id} or similar) that lets us revoke a teammate’s seat programmatically.
We want to manage those that do not login or use Intercom for more than 30 days programmatically. 
We found we can find those via the API, but we can’t remove the seat.
We need the API updated.