How to use the safety.models.Session.objects function in safety

def get_queryset(self):
        return Session.objects.active(user=self.request.user)

def handle(self, *args, **options):
        Session.objects.filter(expiration_date__lt=now()).delete()
        self.stdout.write(self.style.SUCCESS('Deleted expired sessions'))

def create_session(sender, request, user, **kwargs):
    Session.objects.create_session(request, user)

def deactivate_session(sender, request, user, **kwargs):
    try:
        key = request.session.session_key
        instance = Session.objects.get(user=user, session_key=key)
        instance.active = False
        instance.save()
    except Session.DoesNotExist:
        pass