How can I get postal code using GeoIP?

WooCommerce: 3.5.1
WordPress: 4.9.8
GeoIP Detection plugin 2.9.1 https://ru.wordpress.org/plugins/geoip-detect/

I need to set the postal code value from GeoIP into billing or shipping fields in woocommerce checkout. By default (GeoIP Detection plugin) I can only set the following values:

`$record->city->name [geoip_detect2 property=”city”]
$record->mostSpecificSubdivision->isoCode [geoip_detect2 property=”mostSpecificSubdivision.isoCode”]
$record->mostSpecificSubdivision->name [geoip_detect2 property=”mostSpecificSubdivision”]
$record->country->isoCode [geoip_detect2 property=”country.isoCode”]
$record->country->name [geoip_detect2 property=”country”]
$record->location->latitude [geoip_detect2 property=”location.latitude”]
$record->location->longitude [geoip_detect2 property=”location.longitude”]
$record->continent->code [geoip_detect2 property=”continent.code”]
$record->location->timeZone [geoip_detect2 property=”location.timeZone”]`

I set values by following code in child-theme functions.php

`add_filter( ‘woocommerce_checkout_fields’, ‘set_checkout_field_input_value_default’ );

function set_checkout_field_input_value_default($fields) {
$fields[‘billing’][‘billing_city’][‘default’] = do_shortcode( ‘[geoip_detect2 property=”city”]’ );
$fields[‘billing’][‘billing_state’][‘default’] = do_shortcode( ‘[geoip_detect2 property=”mostSpecificSubdivision”]’ );
$fields[‘billing’][‘billing_postcode’][‘default’] = do_shortcode( ‘???’ );
return $fields;
}`

How can I set GeoIP postcode as a default value? Any solution, pls!