Users must log in with their library card number and PIN to access full features of the catalog like commenting or tagging. They can initially skip login but may be prompted if trying certain restricted actions. When registering, a username can include letters and numbers up to 24 characters long, and an email is optional. The account settings page allows customizing the username, email, preferred pickup locations, and changing the PIN number. Help is available through context-specific help buttons and a FAQ page.