Verifies a JWT a provider signed against its keys, with its iss the provider's and sub checked where one is given.
iss
sub
the provider
the JWT
the expected subject, or ''
a promise of { ok: true, claims }, or { ok: false, why }
{ ok: true, claims }
{ ok: false, why }
Verifies a JWT a provider signed against its keys, with its
issthe provider's andsubchecked where one is given.