Unidentified
No marketplace identifier is available. The SDK keeps the id already in effect if there is one - Unidentified never downgrades an identity we already hold - and otherwise mints one and persists it, so the device keeps the same identity across launches. Events under a minted id are delivered and billed normally but will not audience-match.
A minted id is a persistent, device-scoped pseudonymous identifier, which most privacy regimes treat as personal data. It is not anonymisation.
This is not a logout: because it never downgrades, calling Analytics.setup with it after signing a user out leaves their id in effect, which on a shared device attributes one person's activity to another. To represent a new person, pass their id via of.