The account you register here becomes this organization's Owner — the super-admin role with full control over settings, members, and finances.
Owners are deliberately kept out of operational features: dues, voting, money rotation, mutual assistance, attendance, and member charges all skip the Owner account so your administrative work stays clean.
After your first login, invite a second person as Admin from Members → Invite — that's the account you'll use day-to-day for approvals and configuration.