const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://app.facetflux.com/api/v1/pim/exports/products/{productId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

using RestSharp;


var options = new RestClientOptions("https://app.facetflux.com/api/v1/pim/exports/products/{productId}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
var response = await client.GetAsync(request);

Console.WriteLine("{0}", response.Content);

HttpResponse<String> response = Unirest.get("https://app.facetflux.com/api/v1/pim/exports/products/{productId}")
  .header("Authorization", "Bearer <token>")
  .asString();