I’m trying to make a Limited signup system.
I would like to allow those people who have already submitted their email address to sign up.（I already found the solution with the help of people here thanks!）
Also, each person belongs to a team and they can only see information about their team. In order to keep their privacy, I don’t want to allow them to sigh up as a member of other teams.
How can I solve this problem?
Thank you so much your help!