Login? Activation? I have no idea what exactly I'm looking for, I'm sorry.

So I am trying to log in on my ipad, and it tells me my log in information is invalid. I access Adobe Digital Editions through my college account. I tried to download from the online library and it told me to adobe digital editions, but I can't access the book without logging in, so you see my conundrum. I'm not sure what I'm doing wrong or if my college authenticator is not allowing me to log in, in which case I guess I'll have to figure out another method to read the book I need for class.