public async Task <MemoryAttachment?> DownloadAttachment(InAttachment inAttachment)
{
var file = await _api.GetFileAsync(inAttachment.Id).ConfigureAwait(false);
var url = $"https://api.telegram.org/file/bot{_options.Token}/{file.FilePath}";
var response = await _client.GetByteArrayAsync(url).ConfigureAwait(false);
// Todo Refactor this.
int index = file.FilePath.LastIndexOf('/');
var fullName = file.FilePath.Substring(index + 1);
return(AttachmentFactory.CreateMemoryAttachment(fullName, response, inAttachment.Type));
}