OptionaljwksKey set cache to verify against. Defaults to one process-wide
SsoJwks, or, when fetch or now is given, a new one built
from them for this call only; pass a shared instance in that case.
OptionalfetchCustom fetch for the key set when jwks is not given.
OptionalclockSeconds of clock difference allowed when checking exp. Defaults to 0.
OptionalnowClock override for tests, epoch milliseconds.
The application's SSO client id; the
audclaim must contain it.