Login enabled
Blocks new password sign-ins when off. Existing sessions stay until they expire.
Login enabled
Allows or blocks password sign-in.
Where to find it
Admin → Settings → Settings (first tab) → Registration & login → Login enabled
Setting key: toggle.login_enabled (default on unless "false")
How it works
When off, people cannot start a new password login. Existing sessions stay until they expire or are revoked — this is not an instant global logout.
Social login (if enabled under Mods) is separate — lock those down too for a full freeze.
Common problems
Admin locked out
If you disabled login while logged out, recovery is on the server (flip the setting in the DB or use an already-open admin session). Change this only with an admin session open.
Registration on, login off
People can sign up but cannot sign in. Almost always a mistake.