fix: No auth was not working

[jonas-martinez]

About this PR

Closes #

There was a problem with the connexion to the websocket when the user was not connected to an account. In fact, we did not add a case where the user_id was nil in the connexion to the websocket which caused this error. It is fixed by adding this check, then the application_runner takes care of handling the nil user and logging him as a guest instead of a "user" role.

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• [ ] 📜 README.md
• [ ] 📕 docs/*.md
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[taorepoara]

:tada: This PR is included in version 1.5.2 :tada:

The release is available on:

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• v1.5.2

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