AcmeMainly keep and share my own credentials.
They are kept in ID Wallet on your phone. Nothing is shared until you confirm it.
Hold or check credentials
What will you mainly do?
One account does both. Your answer only decides where you start, and it can be changed later.
Mainly check credentials other people show me.
Checking needs no account. With an account you can send a request to someone’s wallet and see your requests later.
You sign in with your username, not your email address.