```javascript


// sample arguments for registration
const createCredentialDefaultArgs = {
          publicKey: {
    // Relying Party (a.k.a. - Service):
  rp: {
      name: "Acme",    },
    // User:
    user: {
      id: new Uint8Array(16),
      name: "carina.p.anand@example.com",   displayName: "Carina P. Anand",
    },
    pubKeyCredParams: [
      {
        type: "public-key",
        alg: -7,
      },
    ],
    attestation: "direct",
    timeout: 60000,
    challenge: new Uint8Array(
[
      // must be a cryptographically random number sent from a server
      0x8c, 0x0a, 0x26, 0xff, 0x22, 0x91, 0xc1, 0xe9, 0xb9, 0x4e, 0x2e, 0x17, 0x1a, 0x98, 0x6a, 0x73, 0x71, 0x9d, 0x43, 0x48, 0xd5, 0xa7, 0x6a, 0x15, 0x7e, 0x38,
  0x94, 0x52, 0x77, 0x97, 0x0f, 0xef,
    ]).buffer,
  },
};
```