Admins: create dedicated admin accounts (name/email/password); an
owner (socio) switch on the creation form makes the new admin an owner
right away. Owners hold full powers; promote a sub-admin to owner, and
owners can be removed by a majority vote of the other owners.
Coaches: maintain your coach list (coaches can work at several clubs).
Trash: every destructive action (cancelling events, removing teams,
admins, coaches) is a soft delete — restore or purge from Trash.
Sub-admin deletions wait for a main-admin approval.
Activity: the owner-visible audit log of every admin action.