This adds a way to specify HTTP headers per request.
Co-authored-by: storyicon <storyicon@foxmail.com>
Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Felix Lange <fjl@twurst.com>
The new error type is returned by client operations contains details of
the response error code and response body.
Co-authored-by: ryanc414 <ryan@tokencard.io>
Co-authored-by: Felix Lange <fjl@twurst.com>