SignKey:
| JsonWebKey & { k?: undefined } & { d: string } & {
alg: "ML-DSA-87";
key_ops: readonly "sign"[];
kty: "AKP";
use: "sig";
}
| JsonWebKey & { k?: undefined } & { d: string } & {
alg: "Ed25519-ML-DSA-65";
key_ops: readonly "sign"[];
kty: "AKP";
use: "sig";
}
Private supported digital signature JWK used to produce signatures.