error messages have "Message" field, not "message"

[glasserc]

This means that the kinesisErrorMessage field is blank.

I'm not sure if this is true of all errors -- I assume the current code must have worked at some point -- but I'm definitely seeing a Message field for AccessDeniedException errors.

[glasserc]

I now believe this is only true for AccessDeniedException errors. Here's the JSON error that got dumped to the screen by https://github.com/alephcloud/hs-aws-kinesis/blob/master/src/Aws/Kinesis/Core.hs#L313:

"{"__type":"AccessDeniedException","Message":"User: arn:aws:iam::375941813383:user/kinesis-publish-stage is not authorized to perform: kinesis:PutRecord on resource: arn:aws:kinesis:us-east-1:375941813383:stream/models.data.Twitter.stage"}"