code: def _get_drive_url(self, url, session):
      
      response = session.get(url, stream=True)
      if response.status_code != 200:
        raise DownloadError(
            'Failed to get url %s. HTTP code: %d.' % (url, response.status_code))
      for k, v in response.cookies.items():
        if k.startswith('download_warning'):
          return url + '&confirm=' + v  # v is the confirm token
      # No token found, let's try with original URL:
      return url
docs: Returns url, possibly with confirmation token.