public async Task <IActionResult> GetProducts([FromQuery] ProductSpecParams productParams)
{
var spec = new ProductsWithTypesAndBrandsSpecification(productParams);
var countSpec = new ProductFilterWithCountSpecification(productParams);
var totalItem = await _productRepo.CountAsync(countSpec);
var products = await _productRepo.GetAllBySpecAsync(spec);
var data = _mapper.Map <IEnumerable <Product>, IEnumerable <ProductToReturnDto> >(products);
return(Ok(new Pagination <ProductToReturnDto> (productParams.PageIndex, productParams.PageSize, totalItem, data)));
}