A parameter to verify the credential. This could be a public key or the secret key. Secret key is used to verify credentials
in situations where the issuer and verifier are the same entity (or share the secret key). Thus, such credentials are not
publicly verifiable
A parameter to verify the credential. This could be a public key or the secret key. Secret key is used to verify credentials in situations where the issuer and verifier are the same entity (or share the secret key). Thus, such credentials are not publicly verifiable