IAM credentials not recognised/used for s3 - plugins used input-s3 + codec-cloudtrail

Hi Mark @warkolm

Thanks for submitting this as a bug, but I am hoping that there may be some
workaround that we can determine to get my Logstash instance working as
intended.

I have been at this for a few weeks now, so it's becoming quite a blocker
for some elements of my current project.

Thanks.