To enable Auto Sign Out for your locations you will need to enable this feature in your location settings.
Here are the two options for doing this:
Option 1
On your home screen, go to LOCATIONS
Navigate to Settings
Scroll down to Location Automatic Sign-Out
Choose from the drop down menu when you would like visitors to be auto signed out
Click Save Changes
Your guests will now be auto signed out based on the settings you have chosen.
Option 2 (quick method)
On your home screen, navigate to the location you would like to edit
Click the Settings option next to the name of the location
Scroll down to Location Automatic Sign-Out
Choose from the drop down menu when you would like visitors to be auto signed out
Click Save Changes