If you have a nsec.app account you can use that, just need to create the app first in amber and then you can login to a nostr app using your-user@nsec.app
If you have your own domain you can use that too
Example:
https://github.com/greenart7c3/greenart7c3.com/blob/main/.well-known%2Fnostr.json
You're amazing all praise to the devs, but for your stupid friend here, i create the keys on amber and after create the account on nsec app?
You create the account in nsec.app first if you don't have one yet.
When trying to login to a app go to amber first and in the permissions screen press the new app floating button. then you will be able to login
