public async Task <bool> DeleteAttachmentAsync(string country, string recordKey, string fileId)
{
s_helper.Check <StorageClientException>(string.IsNullOrEmpty(recordKey),
Messages.Storage.s_errNullRecordKey);
s_helper.Check <StorageClientException>(string.IsNullOrEmpty(fileId),
Messages.Storage.s_errNullFileId);
return(await _dao.DeleteAttachmentAsync(country?.ToLowerInvariant(),
_hashUtils.GetSha256Hash(recordKey), fileId).ConfigureAwait(false));
}