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Discussion on: Implementing Passwordless Authentication in Node.JS

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Brian Barbour

How do you go about implementing that last part? Where clicking the magic link on one device logs you in on another?

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DarkWiiPlayer

Not without some degree of back-end persistence, which I assume is the main reason it's not how what the article does. You'd need to create some sort of short-lived state in the back-end that gets cleared by opening a link in the email. The login-window could then just do polling, or use some more sophisticated method for waiting for the server to grant it access.

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