Most of the examples are using Google and Twitter for showcasing the OAuth 2.0 and OAuth 1.0a flow respectively.
Create OAuth Apps for Google and Twitter (or any provider you want), and set their redirect_uri
accordingly:
http://localhost:3000/connect/google/callback
http://localhost:3000/connect/twitter/callback
Add your OAuth App credentials in config.json
Start the server:
$ npm install
$ node app.js
Navigate to the following URLs in your browser:
http://localhost:3000/connect/google
http://localhost:3000/connect/twitter