Replaces the plugin template with a working plugin that lets several
users share one viewing account while keeping their individual watched
lists accurate.
Three pieces:
- Auto-creating groups. Logging in as "alice+bob" with any named
member's own password provisions the shared account and signs you in.
Verified against 10.11.5: AuthenticateUser offers unmatched usernames
to every enabled provider and re-queries afterwards, which is the hook
this relies on. Gated on a real member password so knowing two
usernames is not enough to create an account.
- Multi-password authentication. IRequiresResolvedUser hands us the
resolved shared account; each member's live stored hash is checked via
ICryptoProvider.Verify. Deliberately avoids re-entering
UserManager.AuthenticateUser, which would trip every member's
failed-attempt counter whenever a different member's password matched.
- One-way played-state sync. Shared account to members only, filtered to
PlaybackFinished/TogglePlayed/Import so playback progress ticks are
ignored. No loop guard needed: member writes carry a non-shared id.
Membership is stored as user IDs rather than re-parsed from the username,
so shared accounts can be renamed freely. The +/name collision resolves
itself because Jellyfin only consults the plugin when no local user
matches the typed name.
Targets Jellyfin 10.11.x / net9.0. Adds Gitea CI (test, build, release),
a builder image, and 34 tests covering the auth and sync rules.
