Thanks for your reply. They are generally members of the forum already. They are also a large group so capturing 50 or so user details and typing it in correctly afterwards may not work well.
I have figured a roundabout way to do this now.
- I create a special category that is for logged in users only.
- Create a thread in that category that is not visible. Even better create that in a private area and move it to the special category after making it invisible. Now only users with the thread link will find it.
- Create a short URL and QR Code for the url of this hidden thread.
- Print and put up at meeting.
- When user scan the link they will be go to the forum and be forced to log in if not already. Once they are logged in they will see the thread.
- Create a badge for reading that thread.