Is email strictly required for each user in auth0, or can users just sign in using a username?

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Hi @mlb92,

Welcome to the Auth0 Community!

Yes, it is possible to configure a username and password authentication for your Connection.

To do so, please enable the Requires Username toggle in your Connection settings:

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(Reference: Adding Username for Database Connections)

Let me add that users can sign in with either a username or email address with their passwords. But during sign up, they must provide all three, the username, email address, and password.

I hope this helps!

Please let me know if you have any questions.

Thanks,
Rueben