Hi Augusto
The quest to do a presentation about Mendix and the credits that come with it, can be obtained via proof (a meetinginvite, a list of attendees, an online webinar with the URL, a videopresentation and the link to the video ...) via Mendix Support. The more info you can provide, the faster you’ll obtain the credits.
I hope this helps you further.
Kind regards,
Leander