That's a Dropwizard thing that I haven't figured out yet. The docs say to rely on the exceptions to format error responses, but didn't make it clear how you would include a body. My reaction was to just include the reason in a header.

Before, we were just returning 500 with no message. I figure a header is better than nothing.

Looking at the API, maybe calling `.entity(someObject)` is the right way to do this. I'll play around with it.