The login is for the app. The app can also be put into Ad Hoc mode for exactly what you are looking to do. :)
The Wifi Guru has builtin security by assigning the username and password plus you can use a NON-Default port which will keep it secure on the Internet. Someone would have to know the following to attach your Wifi Cyber Q 1.External IP address, 2. Port Number, 3.Username, 4.Password. Someone could not even sit on your LAN and use Packet Sniffing because the Username and Password is encrypted in the HTTP Header.
Let me know if this info helps.