code: def get_category_files(self, category):
      self.__verify_category_exists(category)
      return self.get_category(category)["files"]
  
imports: import json
  import os
  from requests.auth import HTTPBasicAuth
  import requests
label_desc: Use image node_id 15 for calling the ReadMeSession obj's underlying member method code with example usage: obj.get_category_files(category) and returns: self