Delete a single user.

def delete(self, request, id):
        """ Delete a single user. """
        if not id:
            # can't delete the whole container
            raise errors.MethodNotAllowed()
        try:
            models.User.objects.get(pk=id).delete()
        except models.User.DoesNotExist:
            # we never had it, so it's definitely deleted
            pass