Is there a way to see whether a currently logged in user account is being used on more than one machine concurrently? I'm trying to find out whether users are sharing their usernames/passwords, as I manage a site that requires payment to access certain content.
I'm using the cookies only user session type. I have looked at using the 'Allow multiple log-ins from a single account?' option to prevent sharing but this caused issues when genuine users tried to access the site using multiple devices.