Freshbooks
Documentation​
https://www.freshbooks.com/api/authenticating-with-oauth-2-0-on-the-new-freshbooks-api
Configuration​
https://my.freshbooks.com/#/developer
Options​
The Freshbooks Provider comes with a set of default options:
https://www.freshbooks.com/api/start
You can override any of the options to suit your own use case.
Example​
import FreshbooksProvider from "next-auth/providers/freshbooks";
...
providers: [
  FreshbooksProvider({
    clientId: process.env.FRESHBOOKS_CLIENT_ID,
    clientSecret: process.env.FRESHBOOKS_CLIENT_SECRET,
  })
]
...