MR6500 Wifi Offloading to Connections with Username Login

I would like to offload my hotspot connection to my school internet during less intensive work to save data. As a school internet, it requires a username+password combo to connect. But MR6500 will not allow me to enter a username, is there a way to get around it?

There should be another box to prompt me to enter a username, but instead, this is what I see.