munin plugin to count openvpn users

munin-plugin-vpn-user-count.sh

#!/bin/bash
if [ "$1" = "config" ]; then
        echo 'graph_title OpenVPN - count of users'
        echo 'graph_args --base 1000 -l 0'
        echo 'graph_vlabel count of users'
        echo 'graph_category network'
        echo 'graph_scale no'
        echo 'run.label users'
        exit 0
fi

USERCOUNT=$( sed -e '/ROUTING TABLE/Q' /var/log/openvpn/openvpn-status.log | tail -n +4 | wc -l )
printf "run.value %s\n" $USERCOUNT