Add response id to error messages from failed requests

[OGKevin]

Steps to reproduce:

1. Make a bad request
2. Try and get the response id from the X-Bunq-Server-Response-Id header.

What should happen:

1. There is a way to get the response id to debug this error on bunq's side if needed.

What happens:

1. 👆 is not possible.

Logs

• Logs 'no logs

Extra info:

• Tested on 0.12.4

References

• Add response id to error messages from failed requests  sdk_php#88

[kid-cavaquinho]

@OGKevin the X-Bunq-Server-Response-Id header is always present in every request, correct? Should it only be returned with 400 messages?

[OGKevin]

@AnTao it is indeed present with each request!

Please see how its implemented in php: bunq/sdk_php#93 or by viewing the referenced issue 👍 So you have an idea on how it should be done.