docs: def create_track_token(request):
      """Returns ``TrackToken``.
      ``TrackToken' contains request and user making changes.
  
      It can be passed to ``TrackedModel.save`` instead of ``request``.
      It is intended to be used when passing ``request`` is not possible
      e.g. when ``TrackedModel.save`` will be called from celery task.
      """
      from tracked_model.models import RequestInfo
      request_pk = RequestInfo.create_or_get_from_request(request).pk
      user_pk = None
      if request.user.is_authenticated():
          user_pk = request.user.pk
  
      return TrackToken(request_pk=request_pk, user_pk=user_pk)