Board, manager and staff access should always be its own admin login, never a role added to a family's membership account. Here's how to set it up the right way, and how to fix it if it was done the other way.
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Give a board member their own login
Go to Admin > Users.
Click Add User.
Enter a Username, Display name, Email (optional) and Password.
Pick the Role, like Board, and save.
Share this login only with the board member. Their family keeps using their regular membership account.
Why not use the membership account?
You can set a membership account's User role to Board, but please don't:
The whole family gets admin access. Kids, spouses and nannies share the family login to buy guest passes or make reservations. With a Board role on it, any of them can change your club's data.
It's easy to get wrong later. When the board member steps down, the next admin may not realize that login is also the family's membership.
Fix a membership account that has board access
Go to Admin > Users and find the board member.
Click the archive icon on their row and click Revert to member. (Or click edit, change Role to Member, and click Save.)
Click Add User and create a separate Board login for them, using the steps above.
💡 Don't worry about the family. Revert to member only removes admin access. The membership account stays active.
See also: How to Manage Admin Users