public async Task <ActionResult <Company> > Put(int id, [FromBody] CompanyDTO request)
{
var company = await _service.GetByIdAsync(id);
await _service.DeletePrefixesByCompanyAsync(company);
company.Name = request.Name;
company.Prefixes = request.Prefixes.Select(p => new Prefix {
Number = p.Number
}).ToList();
_db.Entry(company).State = EntityState.Modified;
await _db.SaveChangesAsync();
return(Ok(company));
}