Access to attribure afterr search (query)

I have in route:

import Ember from 'ember';
export default Ember.Route.extend({
model(params) {

    let city = params.city_name;
    let cuc = this.store.query('city', {
        linkname: city,
    });


    let itm = this.store.query('product', {
        uriName: params.item_name,
    });

    let dictpage = {
        currentCity: cuc,
        currentProduct: itm,

    };

    return dictpage;
},

});

I need get attribute categoryId from cuc, but when i write there:

fot(let i in itm){
   console.log(i.id);
}

dont work. How to do it?

This i need to find category from good item.

Thank you in advance for your answers!