The CloverDX Server has a built-in security module that manages users and groups. User groups control access permissions to sandboxes and operations the users can perform on the Server, including authenticated calls to Server API functions. A single user can belong to multiple groups.
LDAP or Active Directory can be configured with the Server to authenticate users and optionally assign their effective groups (and permissions) from a global directory.
You can manage users and user groups in Configuration > Users and Groups. Please note that you need a List users and List groups permissions, respectively.