private Task CreateFileAsync(bool isNew, string fileName, Stream outputStream)
 {
     if (isNew)
     {
         return(_fileStoreService.CreateAsync(DocumentAssetConstants.FileContainerName, fileName, outputStream));
     }
     else
     {
         return(_fileStoreService.CreateOrReplaceAsync(DocumentAssetConstants.FileContainerName, fileName, outputStream));
     }
 }