Hi all,
according to the nagios plugin developement guide (https://nagios-plugins.org/doc/guidelines.html)
the performance data has to be in a strict format. The commas in the perfdata output from e.g. activeUsers are invalid, and so, monitoring solutions like Icinga2 ignoring them:

[2018-11-29 15:59:27 +0100] warning/InfluxdbWriter: Ignoring invalid perfdata value: users_last_1_hour=20,
So I deleted the commas to get valid perfdata. PR is coming.

Cheers,
Marcus