could you explain further please? authentication of which account?

Weldergods

Please have a look at the following for Nostr authentication :)

https://github.com/nostr-protocol/nips/blob/master/07.md

https://github.com/nostr-protocol/nips/blob/master/46.md

bitcoin

Spank TapAss Exchange: Non-Custodial, Lightning-enabled and Nostr Assets

Please have a look at the following for Nostr authentication :)

https://github.com/nostr-protocol/nips/blob/master/07.md and https://github.com/nostr-protocol/nips/blob/master/46.md