Lono::AuthUrl.fetch(redirect_on_success)
This call returns the authorization url needed for the user to give your app rights to access their Lono.
Lono::AuthUrl.fetch "http://lono.io"
# => http://make.lono.io/dialog/authorize?response_type=code&client_id=client_id&redirect_uri=http://lono.io&scope=write