1. I see the documentation of how much calls the api allows a day. But I can't see any information about how to retrieve the amount of remaining calls for the given timeframe. It is not returned either in the header values just like in any other apis for example.   2. How to bulk unsubscribe contacts? I saw the example of how to unsubscribe a single contact, unfortunatelly it doesn't fit my needs either because first I need to retrieve all the contact fields so just they won't be overriden by blank values. Is there a way to update a SINGLE field of a contact or multiple contacts at the same time, while keeping all the other fields intact (in this case I just want to set the contact to unsubscribed status)?   Thanks. ... View more