Why won't my fire stick connect to the wifi?

I have used my fire stick at home and friends houses multiple times before but it wasn’t until I brought it back to school that I haven’t been able to connect to the wifi. Our school wifi is one of those networks that you have to enter a username and password in order to connect. I have tried “Joining another network” by entering the network name, password, IP address and all that, but I think since it doesn’t give me the option to enter BOTH the username and password it is not going to work. This is super frustrating and I just wanna get it figured out! any suggestions? thanks!!!!