Удивительно, но я нашел трюк, он мне полезен.
from django.contrib.auth.models import User
def user_list_after_me(request):
username = request.user.username
user = User.objects.get(username__exact=username)
start_date = user.date_joined
end_date = datetime.datetime.today().replace(microsecond=0)
user_list = list(User.objects.filter(date_joined__range=[start_date, end_date]))
messages.warning(request, str(start_date)+' || '+str(end_date))
messages.warning(request, len(user_list))
return render(request, 'list.html')