How is the "No login" authentication plugin used?

The "No login" authentication plugin can be used to suspend particular user accounts.

1. Access the user profile page
2. Click on the user name for whom you want to set No login authentication and view his full profile.
3. In the Settings block, click "Edit profile".
4. Select "No login" as the authentication method.
5. Click the "Update profile" button at the bottom of the page.