If you have finished working in atHome but you are getting Authentication requests continually, this is because you have not closed the session correctly.
It is important to close the window (if using the desktop icon) or tab (if using the web browser) before closing the lid of your laptop or shutting the PC down. It is also a good idea to log out of the web site (if that's how you signed in) too.
The cause is the session to the server remains open and is not receiving any input so is 'lost at sea' and tries to sign in again to keep the session alive. The result is that you keep getting Authenticator requests.
Closing the window or logging out tells the server the session has ended so doesn't keep trying to log back in.