public IActionResult Download([FromBody] string[] downloadFiles)
    {
        if (downloadFiles == null)
        {
            throw new ArgumentNullException(nameof(downloadFiles));
        }

        if (downloadFiles.Length == 0)
        {
            return(BadRequest());
        }

        Stream stream;
        string filename;
        string?fullPath = null;

        try
        {
            if (downloadFiles.Length == 1)
            {
                stream   = _uploadSvc.GetFile(User, downloadFiles[0]);
                filename = Path.GetFileName(downloadFiles[0]);
                fullPath = _uploadSvc.GetAbsoluteFilePath(User, downloadFiles[0]);
            }
            else
            {
                stream   = _uploadSvc.GetFiles(User, downloadFiles);
                filename = "download.zip";
            }

            return(File(stream, GetContentType(fullPath ?? filename), filename));
        }
        catch (Exception ex)
        {
            _log.LogError(ex, "There was an error trying to download.");

            return(BadRequest());
        }
    }