Fortnox - Get Stock amount from special stockpoint

functions.php

<?php
/**
* @snippet WooCommerce - Fortnox plugin by Redlight Media - Hämta lagersaldo från en specifik lagerplats
* @author Redlight Media AB / Christopher Hedqvist
* @compatible WooCommerce 3.5.8
*/
function redlight_fortnox_warehouse_stock_point_amount ( $DisposableQuantity, $WC_Product, $fortnox_article ) {
	$articleNumber = $WC_Product->get_meta( '_obj_fortnox_article_number', true );
  	//Vår Lagerplats
	$stockpoint = 'LAGER';

        //Ange vår url, där q=	LAGER är vår StockPointCode
        $url = sprintf(
			'https://api.fortnox.se/api/warehouse/stockpoints-v1/itemsummary/%1$s?q=%2$s',
			$articleNumber,
			$stockpoint
		);

        $response = wp_remote_get(
            $url,
            [
                'headers' => [
                    'Client-Secret' => OBJ_FORTNOX_CLIENT_SECRET,
                    'Access-Token' => esc_attr(get_option('obj_fortnox_access_token')),
                ],
            ]
        );
	Obj_Fortnox_Product_Metabox::log(sprintf('Getting stock for %s (%s) from stockPointCode: %s',$WC_Product->get_name(), $articleNumber, $stockpoint));
	//Wait here to we dont spam Fortnox
	usleep(100000);
        $response_code = wp_remote_retrieve_response_code( $response );
        $body          = json_decode(wp_remote_retrieve_body( $response ),true);
        
        //Obj_Fortnox_Product_Metabox::log(wc_print_r($response,true));
        if ( $response_code == 200 ) {
		Obj_Fortnox_Product_Metabox::log('Getting stock from stockPointCode was successful our availableQuantity is: '.$body[0]['availableQuantity']);
		return $body[0]['availableQuantity'];
	}else{
		Obj_Fortnox_Product_Metabox::log('Getting stock from stockPointCode FAILED: '.wp_json_encode($body));
		return 0;
	}
}
add_filter('obj_fortnox_product_stock_amount', 'redlight_fortnox_warehouse_stock_point_amount', 10,3 );