public async Task AddConnectionAsync(Guid id, decimal cost, Guid destination, string observations)
{
var pointConnection = await _pointRepository.GetAsync(destination);
if (pointConnection == null)
{
throw new DeliveryServiceException("destination_not_found", destination + " was not found.");
}
var connection = new Connection(id, cost, destination, observations);
await Task.WhenAll(_connectionRepository.AddAsync(connection), _graphRepository.AddConnectionAsync(id, connection));
}
