GoToWebinar and GoToMeeting integration - cron job

Hello everybody.
I need to integrate mautic with GoToMeeting and GoToWebinar to control the subscription and sending of emails to the contacts in my database.

I performed all the procedures explained in the documentation page ( also by inserting this part of the Cron job as suggested: php bin/console mautic:citrix:sync but it didn’t work .

How can I solve?