Users synchronization online
This issue was part of the whole user talk. This is not a priority as it may require a lot of dev.
Basically, one goal is that users keep their account on all "synchronized" sessions of Karaoke Mugen, more importantly their fav list.
It was detailed in length here : https://lab.shelter.moe/karaokemugen/karaokemugen-app/issues/115#note_3812