    def set_user_password(self, context, user_id, user):
        user_ref = self.update_user(context, user_id, user)
        try:
            for token_id in self.token_api.list_tokens(context, user_id):
                self.token_api.delete_token(context, token_id)
        except exception.NotImplemented:
            # The password has been changed but tokens remain valid for
            # backends that can't list tokens for users
            LOG.warning('Password changed for %s, but existing tokens remain '
                        'valid' % user_id)
        return user_ref
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.