SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

How would a middleware work in the case of a WebSocket connection ? 

I can't get my head around this as the only solution I find in the doc is related to the `verifySession` which is directly related to the `express` framework ! 

Is there a way I can just validate the `sAccessToken` from my Cookie ?

you can enable JWTs with sessions, and pass the JWT in your socket connection. You can then verify the JWT using any standard jwt verification lib on the backend.

OK thanks

TBH, I am a bit disappointed there is no solution outside the JWT one!

yea i mean.. web sockets don't use cookies etc.. So there is not much of a choice here