public IActionResult GetChilds(Guid id)
 {
     if (id != null)
     {
         IEnumerable <Category>        cats        = _repo.GetChilds(id);
         IEnumerable <CategoryReadDTO> catproducts = _mapper.Map <IEnumerable <CategoryReadDTO> >(cats);
         return(Ok(catproducts));
     }
     return(NotFound());
 }