public async Task <JsonResult> DeleteFile(string fileId)
        {
            if (String.IsNullOrEmpty(fileId))
            {
                Response.StatusCode = (int)HttpStatusCode.BadRequest;
                return(Json(new { Result = "Error" }));
            }
            try
            {
                bool result = await APIServices.DeleteFile(fileId).ConfigureAwait(false);

                return(Json(new { Result = "OK" }));
            }
            catch (Exception ex)
            {
                return(Json(new { Result = "ERROR", Message = ex.Message }));
            }
        }