Changes to Add an existing Custom Field to a Product.

the request property field/id became required

the request property field/value became required

the response property product/categories/items/parent_id became nullable for the status 200

the response property product/compare_at_price became nullable for the status 200

the response property product/cost_per_item became nullable for the status 200

the response property product/days_to_expire became nullable for the status 200

the response property product/variants/items/compare_at_price became nullable for the status 200

the response property product/variants/items/cost_per_item became nullable for the status 200

the response property product/variants/items/options/items/custom became nullable for the status 200

removed the optional property product/categories/items/permalink from the response with the 200 status

removed the optional property product/digital_products from the response with the 200 status

added the new optional query request parameter fields

added the optional property product/appointment_location_id to the response with the 200 status

added the optional property product/appointment_settings to the response with the 200 status

added the optional property product/categories/items/description to the response with the 200 status

added the optional property product/currency to the response with the 200 status

added the optional property product/fields to the response with the 200 status

added the optional property product/google_product_category to the response with the 200 status

added the optional property product/meta_description to the response with the 200 status

added the optional property product/shipping_required to the response with the 200 status

added the optional property product/variants/items/discount to the response with the 200 status

added the optional property product/variants/items/options/items/product_option_id to the response with the 200 status

added the optional property product/variants/items/options/items/product_option_value_id to the response with the 200 status

added the optional property product/variants/items/position to the response with the 200 status

added the optional property product/variants/items/weight to the response with the 200 status

added the optional property product/variants/items/created_at to the response with the 200 status

added the optional property product/variants/items/updated_at to the response with the 200 status

added the optional property product/bundle_components to the response with the 200 status