Unable to log Response Headers koa sample

[powysm]

Hi,

This is possibly(probably) something stupid that I am not getting..
I am trying to log out responseHeaders from my Koa sample, but am having no success.
I have the Koa sample from docs running successfully, and outputting to console with the basics.
But I have been bumping my head for a while and can't figure out how I get cabin JS to log the response Headers via parse-request.

I can successfully do it myself using

const req = parseRequest({ req: ctx, responseHeaders: ctx.response.header }); console.log('req', req)

But am assuming I am missing something and there is a way to get this done from within cabinJS.

Any help appreciated.
Thanks