Call a destination API

using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;

var baseAddress = "https://destinations.occtoo.com/destinations/";
var destinationClientId = "@APPLICATION-ID";
var destinationSecret = "@APPLICATION-SECRET";
var destinationId = "@DESTINATION-ID";

var httpClient = new HttpClient();
httpClient.BaseAddress = new Uri(baseAddress);

dynamic credentials = new { clientId = destinationClientId, clientSecret = destinationSecret };

var content = new StringContent(JsonConvert.SerializeObject(credentials), Encoding.UTF8, "application/json");

var tokenResponse = await httpClient.PostAsync($"{destinationId}/token", content);
var tokenResponseContent = await tokenResponse.Content.ReadAsStringAsync();
var tokenDocument = System.Text.Json.JsonSerializer.Deserialize<JsonDocument>(tokenResponseContent);
var token = tokenDocument.RootElement.GetProperty("result").GetProperty("accessToken").GetString();

// Example assumes you've patched fetch with node-fetch:
// npm install node-fetch
// globalThis.fetch = await import('node-fetch').then(m => m.default)

(async () => {
  const baseAddress = "https://destinations.occtoo.com/destinations/";
  const destinationClientId = "@APPLICATION-ID";
  const destinationSecret = "@APPLICATION-SECRET";
  const destinationId = "@DESTINATION-ID";

  function getToken() {
    return fetch(baseAddress + destinationId + "/token", {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        clientId: destinationClientId,
        clientSecret: destinationSecret
      })
    });
  }

})();