Auto Approve purchTable X++ in D365FO

 VersioningPurchaseOrder versioningPurchaseOrder;

        if (_PurchTable.ChangeRequestRequired)

        {

            versioningPurchaseOrder = VersioningPurchaseOrder::newPurchaseOrder(_PurchTable);

            versioningPurchaseOrder.submitChangeRequest();

            versioningPurchaseOrder.approveChangeRequest();

        }