Get Template

var client = new RestClient("https://apitest.nilvera.com/einvoice/Templates/Download/e6f5e62d-dac8-4314-892c-4dd9dddc47c9");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <API KEY>");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);