When I use dm-tool to lock the screen for userA, I can log in as userB and then use dm-tool to switch back to userA's session without having to enter a password. Is that the expected behavior? If not, how should I switch from A to B without leaving userA exposed?
userA$ dm-tool lock
--> Shows Greeter. Login as userB.
userB$ dm-tool switch-to-user userA
--> Expected this to go to greeter, but it goes right back to userA's session.
Do I have something mis-configured, or what?