Downloads data of completed jobs.

def download_queue(self, job_ids):
        """Downloads data of completed jobs."""
        if self.skip:
            return None

        url = "{}?jobtype=completed&jobIds={}".format(
            self.queue_url, ",".join(str(x) for x in job_ids)
        )
        try:
            response = self.session.get(url, headers={"Accept": "application/json"})
            if response:
                response = response.json()
            else:
                response = None
        # pylint: disable=broad-except
        except Exception as err:
            logger.error(err)
            response = None

        return response