Having trouble logging in? Here's two other options you can do:
Go to your Schoology Homepage
Open a new tab and go to your Schoology Homepage. The app should automatically continue the process from there.
Go to the Schoology API page
Go to the Schoology API page and the app should pick up from there. Your Schoology API page is your homepage + "/api"
(i.e. if your homepage is ud.schoology.com, your API page is ud.schoology.com/api).