Teach me how to use reqests on popmart.com that need a authentication token.

I'm looking for someone who could teach me how to get 'hidden' data from popmart.com about the product (like stock etc. I know the request that gives that data in the response, but the request api url is dynamically generated with some signature token).

I want to write a checkout bot for popmart in python, but I have very little experience with requests.