Poll credential (64 hex chars) — held only by the CLI, never displayed.
Lifetime of the login request, in seconds.
Backend-directed poll interval for pollCliLogin, in seconds.
Stored form of the user code (8 chars, no hyphen).
Display form (XXXX-XXXX) the terminal prints and the URL carries.
Webapp approval URL (per-stage origin, built by the backend).
201 body of
POST /auth/cli/start— the browser-login device flow.