public async Task DeleteAsync(Guid settlementId)
{
var settlement = await _settlementRepository.GetSettlementOrFailAsync(settlementId);
foreach (var userId in settlement.UsersExpenseList)
{
var user = await _userRepository.GetAsync(userId.Key);
user.RemoveSettlement(settlementId);
}
await _settlementRepository.DeleteSettlementAsync(settlement);
}