Appdaemon, how to pass variables to shell_command

Hi, i have a shell_command declared:

turn_screen_off : "ssh -i /config/.ssh/id_ed25519 -o StrictHostKeyChecking=no {{ host }} xset -d :0 dpms force off"

This command works fine with automation:

action:
  - service: shell_command.turn_screen_on
    metadata: {}
    data:
      host: pi@my_host

But how to launch it with appdaemon?

host="pi@my_host"
self.call_service('shell_command/turn_screen_off',host=host})

don’t work

Solved,
must use ip and not hostname… DNS pbl