You don't need a password. you can take your Nostr account everywhere you go. Clients are separate from Nostr. Clients integrate with Nostr. Your password is your Nostr private key. It's a little complicated but you will get it.

This is what makes Nostr so powerful. You can carry 1 account to everywhere you go. This creates the ability for competition amoung clients and also clients tailored for specific purposes.