Here you can generate a token, enter a valid email address into the form and a token will be generated. Take that token and put it into the file tocken.inc.sh and place that file in the directory /opt/cronguard. What you can do as well is download a template with no value from the download page
Download Section and put your generated token there -
important is that you place that file at /opt/cronguard/ because the cron_wrapper.sh expects it there.