Move user logged in between sites.

Hey !

I got a user logged-in in SITE_1, i save in a session the session.secret.
I wish for some cases, to send the logged user to SITE_2 and keep him logged in.

Does it makes sense to redirect him, generating JWT token, that SITE_2 should get, and validate? The problem now is that the JWT token will expire in 15 minutes, so i need to get the session.secret again to keep the user logged in.
How can i achieve this ?

Both SITE_1 and SITE_2 are using the same projectId. and appwrite endpoint
I currently test on Self hosted, but just because the cloud is still not V 1.5.
i use node.js (Remix)

Thanks!