Class SessionKeySigner

attest(options: { challenge: string }): Promise<SessionKeyAttestation>

sign(
    options: {
        allowCredentials?: { key?: { id: string }[] };
        challenge: string;
    },
): Promise<KeyAssertion>

create(): Promise<{ credId: string; signer: SessionKeySigner }>

destroy(): Promise<void>

fromExistingWorker(): Promise<null | SessionKeySigner>