It is useful to have stable and unique identifiers for a security principal. The majority of identitiy management systems in use with Unix systems today (e.g. Active Directory objectGUID, FreeIPA ipaUniqueID, Kanidm UUIDs) assign each account and group a unique UUID and exposing that to applications allows them to refer to accounts in a stable manner. This change does not implement user or group lookup by UUID; that is left for a later PR.
System and Service Manager
Details
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