How do I configure Devise so that if a user signs in from another device (not Devise!) and has failed to log out from that other device such that the user is asked if a forced log out of the OTHER log-in should be done?
I assume Devise can detect that a new session is about to be created. Is my assumption correct?
Basically, I need only a single user signed in to be using my application at any one time. Is this possible to do? That is, if I have two valid users [email protected] and [email protected], the two users can both be signed in at the same time but [email protected] and [email protected] can each be only signed in once.
You can use this gem: https://github.com/phatworx/devise_security_extension
specifically the :session_limitable module