Creating the customer for an order in DK using separate HTTP calls

This is because DK can't take in payment terms, payment methods and ledger codes in the same call as the order.

src/Export/Order.php

@@ -4,6 +4,7 @@
 
 namespace NineteenEightyFour\NineteenEightyWoo\Export;
 
+use Automattic\WooCommerce\Admin\API\Customers;
 use NineteenEightyFour\NineteenEightyWoo\Brick\Math\BigDecimal;
 use NineteenEightyFour\NineteenEightyWoo\Service\DKApiRequest;
 use NineteenEightyFour\NineteenEightyWoo\Config;
@@ -134,13 +135,12 @@ public static function to_dk_order_body( WC_Order $wc_order ): array {
 		$customer_array['Number'] = OrderHelper::get_kennitala( $wc_order );
 
 		if ( ! ExportCustomer::is_in_dk( OrderHelper::get_kennitala( $wc_order ) ) ) {
-			$customer_array['Name']     = $wc_order->get_formatted_billing_full_name();
-			$customer_array['Address1'] = $wc_order->get_billing_address_1();
-			$customer_array['Address2'] = $wc_order->get_billing_address_2();
-			$customer_array['City']     = $wc_order->get_billing_city();
-			$customer_array['ZipCode']  = $wc_order->get_billing_postcode();
-			$customer_array['Phone']    = $wc_order->get_billing_phone();
-			$customer_array['Email']    = $wc_order->get_billing_email();
+			if ( 0 === $wc_order->get_customer_id() ) {
+				Customer::create_in_dk_from_order( $wc_order );
+			} else {
+				$wc_customer = new WC_Customer( $wc_order->get_customer_id() );
+				Customer::create_in_dk( $wc_customer );
+			}
 		}
 
 		$recipient_array['Name']     = $wc_order->get_formatted_billing_full_name();
@@ -152,10 +152,6 @@ public static function to_dk_order_body( WC_Order $wc_order ): array {
 
 		$store_location = wc_get_base_location();
 
-		if ( $wc_order->get_billing_country() !== $store_location['country'] ) {
-			$customer_array['Country'] = $wc_order->get_billing_country();
-		}
-
 		if ( $wc_order->get_shipping_country() !== $store_location['country'] ) {
 			$recipient_array['Country'] = $wc_order->get_shipping_country();
 		}