Implement Authorization for $batch request XSJS

Hi,

I have an oData on SCP Cloud foundry XSA.

I want to implement authorization check for $batch request. Basically i am having express + passport for the user auth related aspects.

A set of users have GET privilege, another set have update prevliage etc.

The logics works perfectly fine for GET/PUT/POST/DELETE request.

But for $batch as we know its at POST request with multiple request in request body. It can be a GET/PUT etc.

So how do we do such a thing?