ProcessWire uses a role-based access-control system (RBAC) to control user access.

This section is incomplete and more information will be added soon. 

• $user
  The $user API variable is your connection to the current user viewing the page.

• Roles
  Roles are a way of grouping multiple users and assigning permissions to that group. Roles can also be assigned to pages, giving users in the role access to view or edit specific pages.