def delete(self):
        self.manager.delete(self)
this method should return a list of the users in the instance
dataset/ETHPy150Open jacobian-archive/openstack.compute/openstack/compute/ipgroups.py/IPGroup.delete--crossover with--dataset/ETHPy150Open globocom/database-as-a-service/dbaas/drivers/base.py/BaseDriver.list_users