-- Add expired_at column to users table ALTER TABLE users ADD COLUMN expired_at DATETIME NULL AFTER created_at; -- Update existing users to have no expiration (NULL means unlimited) -- You can manually set expiration dates for specific users later -- Example: Set expiration for a specific user (uncomment and modify as needed) -- UPDATE users SET expired_at = DATE_ADD(NOW(), INTERVAL 30 DAY) WHERE id = 1;