public async Task <IEnumerable <ContentInfo> > ListContentAsync(ContentType contentType)
        {
            var dirPath = "/posts";
            var content = await gitHubClient.GetContentAsync(dirPath);

            return(content.Select(c => new ContentInfo()
            {
                Name = c.name,
                Path = c.path,
                Dir = Path.GetDirectoryName(c.path)
            }));
        }