1. In the left pane, click the More icon (three dots) to access more menu options.
  2. Click Settings and Privacy to open options related to signing in.
  3. In Settings, click Account. 
  4. In the right pane, under Data and Permissions, click Apps and Sessions. 
  5. Under the Sessions section, click Log out of all the sessions. 
  6. Click Log out to confirm the action.