public IHttpActionResult AddRepositoryToFavorites(string clientId, Repository repository)
        {
            bool result = false;

            try
            {
                if (string.IsNullOrWhiteSpace(clientId) || repository == null)
                {
                    return(BadRequest());
                }

                result = FavoritesStorage.AddRepository(clientId, repository);

                if (result)
                {
                    return(Created(string.Empty, result));
                }
                else
                {
                    return(Conflict());
                }
            }
            catch (Exception ex)
            {
                return(InternalServerError(ex));
            }
        }