using Gr4vy;
using Gr4vy.Models.Components;
using System.Collections.Generic;

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

var res = await sdk.PaymentServiceDefinitions.SessionAsync(
    paymentServiceDefinitionId: "adyen-ideal",
    requestBody: new Dictionary<string, object>() {

    }
);

// handle response

{
  "type": "payment-service-session",
  "status": "succeeded",
  "code": "UNKNOWN_ERROR",
  "status_code": 201,
  "response_body": {
    "sessionId": "12345"
  }
}