private async void ExecuteCadastrarRecipienteCommand()
        {
            try
            {
                var recipient = new Recipient()
                {
                    provider = "Sample Provider",
                    recipient_affiliation_key_in_provider = "4a48baaf-dcdd-40cd-852e-50e3de33d192",
                    recipient_name = "Sample Recipient 2"
                };

                var result = await StoneService.CadastrarRecipiente(recipient);

                if (result != null && result.success)
                {
                    await Application.Current.MainPage.DisplayAlert("Informação", "Recipiente cadastrado!\n" + result.data.recipient_name + "\n" + result.data.recipient_key, "OK");
                }
                else
                {
                    await Application.Current.MainPage.DisplayAlert("Informação", "Não foi possível cadastrar o recipiente!", "OK");
                }
            }
            catch (Exception ex)
            {
                await Application.Current.MainPage.DisplayAlert("Informação", ex.Message, "OK");
            }
        }