Drift API: How to update the Conversation Status

We were hit with a ton of Spam messages and we want to be able to "close" all the conversations started by that Spam bot.

We are able to query and list all conversations that are open, and can get the messages to make sure they are from that Spam Bot (as they are all the same), but there is nothing in the Drift API docs to update the status of a subscription.

Is there a way to use the Drift API to change the status of a conversation to "closed" via an API call? and if so, how do we make that call?