using Gr4vy;
using Gr4vy.Models.Components;

var sdk = new Gr4vySDK(bearerAuth: "<YOUR_BEARER_TOKEN_HERE>");

ClickToPaySessionRequest req = new ClickToPaySessionRequest() {
    CheckoutSessionId = "4137b1cf-39ac-42a8-bad6-1c680d5dab6b",
};

var res = await sdk.DigitalWallets.Sessions.ClickToPayAsync(req);

// handle response

{
  "type": "error",
  "code": "bad_request",
  "status": 400,
  "message": "Generic error",
  "details": []
}