After the winter break I updated my environment to 3.5.1 and noticed there were some other undocumented changes with how to pull out data so I haven't been able to get back to this endpoint. Changes such as channel_id being nested inside ['data']['post'] where is was top level before and now we are seeing the connection close after a minute of no activity where it was working without issue on 3.4.
This call is for getting user data such as user name and email based on user id of the person making the request so it can be included in a request to an external system