public async Task <FileResult> Download(string fileId, string fileName)
{
//return File(Path.Combine(Server.MapPath("~/App_Data/Upload/"), p), System.Net.Mime.MediaTypeNames.Application.Octet, d);
CustomerFile custFile = await APIServices.DownloadFile(fileId).ConfigureAwait(false);
return(File(custFile.DocumentData, System.Net.Mime.MediaTypeNames.Application.Octet, fileName));
}