using Gr4vy;
using Gr4vy.Models.Components;

var sdk = new Gr4vySDK(
    id: "example",
    server: SDKConfig.Server.Sandbox,
    bearerAuthSource: Auth.WithToken(privateKey),
    merchantAccountId: "default"
);

var res = await sdk.PaymentMethods.NetworkTokens.ListAsync(paymentMethodId: "ef9496d8-53a5-4aad-8ca2-00eb68334389");

// handle response

{
  "items": [
    {
      "type": "network-token",
      "id": "918f6c9b-5d11-4897-98dc-23fda6fe0055",
      "expiration_date": "12/30",
      "payment_method_id": "ef9496d8-53a5-4aad-8ca2-00eb68334389",
      "status": "active",
      "token": "4111123456789012",
      "created_at": "2013-07-16T19:23:00.000+00:00",
      "updated_at": "2013-07-16T19:23:00.000+00:00"
    }
  ]
}