Reading QR code sends info to HA without authorization?

Hello. In HA I have generated QR code with random number. It contained URL URL-Based Tag - Home Assistant<tag_code>. By reading that QR code with generic QR reader, it got detected it in my own HA server. That means that no authorization was necessary?

I would like to use QR code for authorization - that HA server generates code, displays it on screen and then user reads it with his mobile device and only if the user is authenticated into HA companion application or browser, then the automation on server starts.

Is that achievable?

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You can use this: Multi-factor authentication - Home Assistant and GitHub - DeerMaximum/QR-Code-Generator: Custom Home Assistant integration to create a camera that displays a custom QR-Code. How to start.