you click on those 4 bars thingies and there's "log out" option
also mgg gonna log out your acc eventually after 2 days
3 bars* on the top eheh
I really don't know, but try changing your password.
Anyway I think it logs off if you don't enter in a day.
TYSM U LITERALLY SAVED MY LIFE
UEGDHSBSBV TYSM <33
non manga related but how do you log out of ur mangago acc from another device? i left my other phone with my parents and i dont want them to see the porn I've been reading