Everybody as staff?

Thank you, Tnomi, for an excellent plugin. I have used it creative as a training calendar for members of a sports club.
I would have one big wish – for further development – or if somebody has an idea how to do it: Instead of me going backend for every user to click “staff” – it would be easier if every member automatically get that role – or by one-click can be granted that role.

Best regards from Copenhagen
Erling