code: def find_behind_subscriptions(self, request):
          
  
          task_id = find_behind_subscriptions.delay()
          return Response(
              {"accepted": True, "task_id": str(task_id)}, status=status.HTTP_202_ACCEPTED
          )
docs: Starts a celery task that looks through active subscriptions to find
          and subscriptions that are behind where they should be, and adds a
          BehindSubscription for them.