void LoginPromptBrowserTestObserver::Register(
    const content::NotificationSource& source) {
  registrar_.Add(this, chrome::NOTIFICATION_AUTH_NEEDED, source);
  registrar_.Add(this, chrome::NOTIFICATION_AUTH_SUPPLIED, source);
  registrar_.Add(this, chrome::NOTIFICATION_AUTH_CANCELLED, source);
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.