using FastBill.Api.Response; using FastBill.Models; using RestSharp; using RestSharp.Authenticators; using Contact = FastBill.Models.Contact; namespace FastBill.Api; public class Contacts { async public Task> GetContacts(Settings settings, string customerId) { var customers = new List(); var client = new RestClient("https://my.fastbill.com/"); var request = new RestRequest("api/1.0/api.php"){ Authenticator = new HttpBasicAuthenticator(settings.EMail, settings.ApiKey) }; request.AddJsonBody(new { SERVICE = "contact.get", FILTER = new { CUSTOMER_ID = customerId } }); var response = await client.ExecuteAsync(request); if (response.StatusCode == System.Net.HttpStatusCode.OK) { return response.Data.Response.Contacts; } return customers; } }