I have installed respected plugin pack for this in centreon server for this location ( /usr/lib64/nagios/plugin) and I have updated the slack hook url and api key and manuall tried with the command its triggered to slack channel and configured in caommds > notfication option slack_host_notify and slack_service_notiy also verified the parameter monitorng alson in same path location and attached the notification contact user but still i am not getting a notification in slack channel