using System.Net.Http.Headers;
using System.Threading.Tasks;
private static readonly HttpClient client = new HttpClient();
static async Task Main(string[] args)
var userName = "movidesk";
var passwd = "3090sddKK5JEhtSUD4WND9rJPnDSKODSKLDCHcT2u";
var url = "https://cloud.canaltelecom.com.br:9471/api/clicktodial?origem=4000&destino=47984916229";
var authToken = Encoding.ASCII.GetBytes($"{userName}:{passwd}");
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
Convert.ToBase64String(authToken));
var result = await client.PostAsync(url, null);
Console.WriteLine(result.IsSuccessStatusCode);