/// <summary>
/// Add one point up for sale, relate to ranking
/// </summary>
/// <param name="saleId">Unique identification of sale</param>
/// <param name="rank">How much rank it will update</param>
/// <param name="userId">Unique identification of user</param>
/// <returns></returns>
public async Task AddRankForSale(int saleId, int rank, int userId)
{
await _saleRepository.AddRank(saleId, rank);
await _saleRepository.ConnectUserRank(saleId, userId);
}
