Portainer >=2.21 no longer lets whoever loads the page first claim the
admin account: on a fresh install it mints a one-time setup token and
prints it ONLY to the server logs. On an appliance that is a dead end —
'check the Portainer server logs' is exactly what a user cannot follow,
and after the 2.45.0 update it made a freshly restarted Portainer look
broken ('disappeared', then demands a token nobody can find).
package.credentials — the same RPC that powers the login-credentials
card on the app page — now extracts the setup_token line from
portainer's recent container logs and hands it over with the existing
copy-button treatment, titled and explained for a first-time user. The
token stops being printed once setup completes, and any container
recreate drops the log line, so the card disappears on its own and no
dead token lingers. Parsing is a pure, unit-tested scan against the
live-captured 2.45.0 log shape (64 hex chars after setup_token=).
archipelago
f133d5555a