Refit with customized reasonphrase

[RHaughton]

Hi,

I'm using refit to call a Web API.
My Web Api doesn't throw exceptions but handles Validation, Not founds, already exists, etc... with Result objects (I'm using the library Fluent Results btw).

My result object has an Error property which is populated whenever an Error occurs.
Based on this I return a 40X.

How can I customize the ReasonPhrase of the Refit APIResponse to reflect the Error Property of my result object?
In other words how can I customize the ReasonPhrase of Refit ApiResponse to send more meaningfull error message to my frontend?

Thanks for your help