public async Task <string> Handle(CreateCityCommand request, CancellationToken cancellationToken)
{
var cityExist = await _distributorRepository.CityExistAsync(request.Name);
if (cityExist)
{
throw new CityAlreadyExistException(request.Name);
}
var city = new City(Guid.NewGuid().ToString(), request.Name);
_distributorRepository.AddCity(city);
await _distributorRepository.UnitOfWork.SaveEntitiesAsync();
return(city.Id.ToString());
}