How to copy "Devices AccessToken" from an istance of Jellyfn to another?

[I-G-1-1]

My issue: sometime I have to make maintenance on my main server running Jellyfin (A), so to avoid my family loose Jellyfin access I spin up another istance of Jellyfin on another server (B) and NGINX provide to automatically route to this istance.

At the boot istance B get user watched items from Trakt and the whole "server switch" would be transparent to the user except for the fact that now istance B ask the user to authenticate.

As family it's not so techy, it becomes a real issue as they don't know how to re-authenticate.

So my question is: how can I transfer the "AccessToken" from istance A to istance B without copying every time all the /var/lib/jellyfin folder?

Istance B initially was a clone of a Proxmox LXC of the istance A, so users and their "UserId" are the same.

I see that /var/lib/jellyfin/data/jellyfin.db has a table called "Devices" that contains the "AccessToken". Would be enough to copy this table from the database A to database B?

If yes, how can I do this using a bash script (I'm not a programmer)?

Basically I need to:
1. extract "Devices" table from jellyfin.db of istance A and save to some file
2. scp the file to server B
3. import "Devices" table to jellyfin.db of istance B (replace the whole table could be good enough)

Any help would be appreciated, thanks