Monitoring FreeRadius with Icinga2

This is a brief question for those who use Icinga2 to monitor their FreeRadius servers. Do you use the built in radius check command, the remote (on the radius server) nagios check command, a bash/python script that executes 'radtest' remotely against the radius server (secret needs to be added as a variable to icinga), or something else? If you use a bash/python script, there are a few of them out there, what is the lists preference? Thank you,  Jonathan