[ovirt-users] cancel ticket in ovirt-engine

hi.... my scenario: i have multi server installed rhev or ovirt-engine and one sever installed rhevm or ovirt-engine ..... and i bought thin client which connect by spice to rhev server and controll them... i can use thin client for connect to rhev server but the problem every connect i should make new ticket for spice protocol.... when i run vm by rhevm interface the log for vm in this path :/var/log/libvirt/qemu/vmname.log is seem run qemu command and enable options for vm,,, my question how i can add this option (disable-ticket) when user start run vm ??? another mean i want cancel ticket or make it lifetime .... thanks.. i my question not understaded please tell me...