Access raw request/response for both OAuth methods

[Zylatis]

Hi,

I'm currently using a private application login and it would be really useful to access the raw request/response objects and data being thrown around under the hood (to check up on API requests remaining, for example). It seems to me that mostly the responses are scoped locally in the _get_data() methods, are there any plans to expose them, or have an option to return them along with the formatted Xero response?