The Client ID, find it at https://osu.ppy.sh/home/account/edit#new-oauth-application
The specified Application Callback URL, aka where the user will be redirected upon clicking the button to authorize
What you want to do with/as the user
The API server (defaults to https://osu.ppy.sh, leave as is if you don't know exactly what you're doing)
The link people should click on
Generates a link for users to click on in order to use your application!