public async Task <Link> Create(string clientId, string url)
{
var link = await _linksRepository.GetByUrl(clientId, url);
if (link != null)
{
link.ShortUrl = getShortUrl();
await _linksRepository.Update(link);
return(link);
}
var newLink = new Link(clientId, url, getShortUrl());
await _linksRepository.Insert(newLink);
return(link);
}