If so, you need SAP Universal ID. In a few months, SAP Universal ID will be the only option to login to SAP Community. Without it, you will lose your content and badges. If you have multiple accounts, use the Consolidation Tool to merge your content.
i search a function module for list all invoices that belong to an invoicelist. For example, in TA VF23 i can look which invoices belong to an invoicelist. I search a function module for give me a list of them.