Hi @orangeuser442,
Thanks for contacting Auth0 Community, we’re happy to lend a hand.
Could you provide the documentation that you’ve used to set up your passwordless connection? It sounds like you’re doing a passwordless email flow, how are you expecting the flow to work?
However to answer some of your questions:
Here’s our documentation on magic links that should cover this topic:
The above link mentions the code but basically instead of a link that automatically logs the user in, the email would contain a code that the user would input when returning to the app.
This will work with new or pre-existing users. Once successfully authenticating a user profile will be created.