def userproduct_post_delete(sender, instance, **kwargs):
"""delete ssh user at all ssh-server ,
when delete ssh user at admin site.
"""
sshuser = instance.sshuser
#create ssh on all ssh server
ssh_util = SSHUtil(instance.user)
ssh_util.ssh_delete_onall(sshuser)
# sleep for the situation delete more than 1 account at one time
sleep(2)
