Concepts:
The main concepts involved in security are detailed below.
For a basic introduction, it is recommended that you read about users, groups and ACLs.
Core concepts ACL: An access control list (ACL) determines which users can access functions. Group: Groups of users. Relationship: Relationship between users, used to define organisational structure. User: Users represent people who can use the system.
Other concepts User information: Additional information attached to a user.
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