Ariadne codegen with custom HTTP client

[dkbarn]

The README for ariadne-codegen mentions that you can pass a custom HTTP client for complex scenarios, but it doesn't provide any guidance beyond the one-line code snippet:

client = Client(http_client=CustomComplexHttpClient())

Where can I find documentation or examples of how to implement such a CustomComplexHttpClient class? Presumably it needs to conform to some sort of interface. Where is that interface defined? What methods need to exist on this class?

[rafalp]

Ariadne Codegen uses HTTPX. We should update readme to mention that.