Currently, we're using Showtime for webinars to encourage signups to our app.

I'm passing registration data to Flow from Showtime when someone registers for a session and passing a web hook to Flow when someone signs up for our app.

What I'd really like to do is have a step in the middle which captures the actual attendees for the webinars. This will allow me to automatically email people (via Marketing Hub) who attended but never went on to signup.

I've created a flow with the trigger 'Attendee added' but it doesn't seem to be working. We've conducted several webinars and people have triggered 'Registration added' but not 'Attendee added'.

Can anyone help or has anyone done anything similar?

Any help gratefully appreciated.