code: def _request(self, *args, **kwargs):
          
          if not self.token:
              self._obtain_token()
  
          headers = {
              "Authorization": "Bearer {}".format(self.token)
          }
  
          # add authorization headers
          if "headers" in kwargs:
              kwargs["headers"].update(headers)
          else:
              kwargs["headers"] = headers
  
          # add api site to url
          args = list(args)
          if not args[1].startswith("http"):
              args[1] = "{}{}".format(API_URL, args[1])
  
          has_no_token = kwargs.get("no_token")
          if has_no_token:
              del kwargs["no_token"]
          resp = requests.request(*args, **kwargs)
          if resp.status_code == 401 and not has_no_token:
              self._obtain_token()
              kwargs["no_token"] = True
              self._request(*args, **kwargs)
          return resp
docs: Make a signed request to the libcal API.