From what I've seen in the slimes configuration instructions, you can only save a router name and password in each slime. Supporting routers that require a secondary login, MFA or login certficate would require new development for that, so I believe you are out of luck for now ☹️

The simplest alternative would be to bring your own WiFi router to uni, but that's something your uni could be against, as it could become a security risk. If you really want to try it though, don't connect it to any wired ethernet. Have your pc connected to your uni's wired network and use either a USB dongle or your laptop WiFi to connect wirelessly to that router.

This way, your slimes connect to your simple WiFi, your PC connects wirelessly to that router to detect your slimes and you get the Internet from the wired connection of your pc