Some Tweaks over the weekend.
Hosting can now send messages to the RSVP invitees. You can target Yes, Yes & Maby, All. You can send a targeted message, with a URL link back to the message give more information about the Event things like directions, what to bring... a picture of the host in a embarrassing position....
I gave some polish to the MFA, I use the app 1Password for my personal MFA, you can use what ever MFA app of your choice, even SMS. I made some changes to make the MFA process work better with Apps like this. Also users will get a notification if they want to use MFA or not, its completely optional.
@SixSeven found a bug where answered RSVP's were not sending notification to the organizers and that was fixed.