When you are logged into the site, click on the icon in the upper right corner, on the top navigation bar and then click on Logout
in the dropdown list.
In Mobile Phone:
Click on the menu on the top right, it will expand. Then the last item in the black nav is an icon (it will be either a gear icon
or a person icon
), click on that icon and it will expand and there will be 3 items, the last one will be LOGOUT. Then click on the logout
link and you will be logged out.