newFromCredentialRef

Create a new credential acquisition from an existing credential. This API is temporary until our system decouples client identities from a client's public signature key. See https://wearezeta.atlassian.net/wiki/x/RABtrQ.

Provide coreCryptoDatabase if you're using distinct DB instances for PkiEnvironment and CoreCrypto. Otherwise, the PkiEnvironment's DB will be used to load the full credential.