public async Task DownloadPDF()
        {
            dialogService.ShowProgress();
            RequestServiceFile request = new RequestServiceFile
            {
                Code = ServiceHistorySelected.FileCode,
                User = loginViewModel.User.UserName
            };
            ResponseServiceFile response = await apiService.GetServiceFile(request);

            dialogService.HideProgress();
            ValidateResponseServiceFile(response);
        }
        private async void ValidateResponseServiceFile(ResponseServiceFile response)
        {
            if (await validatorService.ValidateResponse(response) == false)
            {
                return;
            }

            dialogService.ShowProgress();
            byte[] sPDFDecoded = Convert.FromBase64String(response.Value);

            if (phoneService.IsiOS || (!phoneService.IsiOS && await permissionService.CheckPermissions(Plugin.Permissions.Abstractions.Permission.Storage)))
            {
                await phoneService.SaveFiles(AppConfigurations.TitleFileServiceHistory, sPDFDecoded);
            }

            dialogService.HideProgress();
        }