def navigate(store_id, category_id, node_id)
      response = api_get("Stores.egg", "Navigation", "#{store_id}/#{category_id}/#{node_id}")
      categories = JSON.parse(response.body)
    end
def navigate(store_id, category_id, node_id)
      response = api_get("Stores.egg", "Navigation", "#{store_id}/#{category_id}/#{node_id}")
      categories = JSON.parse(response.body)
    end
retrieves information necessary to search for products, given the store_id, category_id, node_id

 @param [Integer] store_id of the store
 @param [Integer] category_id of the store
 @param [Integer] node_id of the store