This is a an app that shows how to integrate with Promise.

Promise uses a simplified version of the Implicit Flow in OpenID Connect.

The Authentication Request is issued by redirecting the user to

https://promiseauthentication.org/a/ruby.promiseauthentication.org?nonce=ee88122a-9535-40e0-bca1-daa9d645334e

That is what happens when you click the green button. Go ahead.