We have two different settings, endpoint and region, which determine the endpoint that is set on the aws client (and both of these appear unnecessary by default, as neither are required, and the s3 client appears to automatically find the region for a given bucket). My understanding is that it is useful to have an explicit setting to allow connecting to new regions without needing a new release. However, I don't think we need both settings? We should settle on one (I would think endpoint, and remove region altogether?).