issue
open suspend override fun issueCredential(subjectId: String, attributeType: String): Issuer.IssuedCredentialResult
Issues credential for attributeType to subjectId, calls dataProvider
open suspend override fun issueCredential(credential: IssuerCredentialDataProvider.CredentialToBeIssued): Issuer.IssuedCredentialResult
Wraps credential into a single VerifiableCredential, returns a JWS representation of that VC.