Newb to cashu…. When first heard about the lightning address here, quickly set up a npub.cash based on primal npub (previous reply). Then investigated more, set up a new cashu.me wallet, which has its own npub, and see option for npub.cash lightning address. Question is if that [email protected] (primal npub) is useful? Or can only use cashu.me npub based address as that’s from wallet?