code: def open_recruitment(self, n=1):
          
          logger.info("Opening CLI recruitment for {} participants".format(n))
          recruitments = self.recruit(n)
          message = (
              'Search for "{}" in the logs for subsequent recruitment URLs.\n'
              "Open the logs for this experiment with "
              '"dallinger logs --app {}"'.format(
                  NEW_RECRUIT_LOG_PREFIX, self.config.get("id")
              )
          )
          return {"items": recruitments, "message": message}
docs: Return initial experiment URL list, plus instructions
          for finding subsequent recruitment events in experiemnt logs.