public async Task <Unit> Handle(DeleteCityCommand request, CancellationToken cancellationToken)
{
// get distributor by id
var city = await _distributorRepository.FindCityByIdAsync(request.CityId);
if (city == null)
{
throw new CityNotFoundException(request.CityId);
}
city.DeleteCity();
_distributorRepository.DeleteCity(city);
// save changes in the database and rase DistributorUpdated event
await _distributorRepository.UnitOfWork.SaveEntitiesAsync(cancellationToken);
return(Unit.Value);
}