Verifies what the browser produced for a pending enrolment and only then writes the key, claiming its credential id across the cluster.
the person
the pending enrolment's id
what the browser posted
Optional
origin and rpId, what the browser was talking to
origin
rpId
a promise of addKey()'s answer, or a refusal
addKey()
Verifies what the browser produced for a pending enrolment and only then writes the key, claiming its credential id across the cluster.