code: def recruit(self, n=1):
          
          logger.info("Recruiting {} Bot participants".format(n))
          factory = self._get_bot_factory()
          urls = []
          q = _get_queue()
          for _ in range(n):
              base_url = get_base_url()
              worker = generate_random_id()
              hit = generate_random_id()
              assignment = generate_random_id()
              ad_parameters = (
                  "recruiter={}&assignmentId={}&hitId={}&workerId={}&mode=sandbox"
              )
              ad_parameters = ad_parameters.format(self.nickname, assignment, hit, worker)
              url = "{}/ad?{}".format(base_url, ad_parameters)
              urls.append(url)
              bot = factory(url, assignment_id=assignment, worker_id=worker, hit_id=hit)
              job = q.enqueue(bot.run_experiment, timeout=self._timeout)
              logger.warning("Created job {} for url {}.".format(job.id, url))
  
          return urls
docs: Recruit n new participant bots to the queue