public async Task <(Municipality addedMunicipality, string error)> AddAsync(string name)
{
if (await _municipalityRepository.Exist(name))
{
return(null, Messages.SameMunicipalityExist);
}
var municipality = new Municipality {
Name = name
};
_municipalityRepository.Add(municipality);
await _unitOfWork.CommitAsync();
return(municipality, null);
}