A vanilla-flavoured J! 3.8.13 website.
1) Main menu assigned to the "Navigation [position-1]" position using CSS suffix " nav-pills"
2) Create a menu item of menu type = Users » Logout. Publish the menu item and set the permissions so that it's accessible only to Registered users
4) Test username to login is Username = "testing", Password="FF1111".
5) Please login to test.