docs: def download_rec(session, rec_url, target_path):
      """Download and extract a recorded game."""
      try:
          resp = session.get(session.auth.base_url + rec_url)
      except RequestException:
          raise VooblyError('failed to connect for download')
      try:
          downloaded = zipfile.ZipFile(io.BytesIO(resp.content))
          downloaded.extractall(target_path)
      except zipfile.BadZipFile:
          raise VooblyError('invalid zip file')
      return downloaded.namelist()[0]