Discord API - OAuth2

Ok, I have quite the challenging question. So I’m creating an app using bubble[dot]io and using their API Connector plug-in to use Discord’s API that gets account information for a user by their ID (username, discriminator, profile picture, etc). I am having trouble though with the OAuth2 part as I have no idea how to obtain a token for authentication. Was wondering if anyone could help. The attached picture is what it looks like, but I don’t know what to put in the two empty boxes at the top where it’s title “Authentication.”

Pic: ibb[dot]co[slash]Vv0nMVZ