docs: def _post(self, url, **kw):
          '''
          Makes a POST request, setting Authorization
          header by default
          '''
          headers = kw.pop('headers', {})
          headers.setdefault('Authorization', self.AUTHORIZATION_HEADER)
          kw['headers'] = headers
          resp = self.session.post(url, **kw)
          self._raise_for_status(resp)
          return resp