| Acl |
| UserInterface | User Interface, based on charcoal/object/content-interface. |
| AbstractUser | Full implementation, as abstract class, of the `UserInterface`. |
| Authenticator | The Authenticator service helps with user authentication / login. |
| Authorizer | The authorizer service helps with user authorization (permission checking). |
| AuthToken | Authorization token; to keep a user logged in |
| AuthTokenMetadata | User Auth Token metadata |
| GenericUser | Concrete implementation of UserInterface |