event handler `ovos.shell.oauth.authentication.forward` missing

[emphasize]

when i get this right this phal plugin starts the "flow" (given a correct register of the app)

• emitting the event oauth.start
• the oauth url (auth_endpoint) gets created
• this url is forwarded to ovos-shell per event ovos.shell.oauth.start.authentication
• shell now shows OAuthLoader.qml where credentials could be entered if needs_credentials flag is True
• the entered credentials should be sent back with the event ovos.shell.oauth.register.credentials, reregistering and restarting the flow
• to close, if it doesn't needs_credentials, forward the url with the event ovos.shell.oauth.authentication.forward

But there is no event handler registered anywhere. What am i missing? I don't think this should be implemented per app/skill? Or is there something to be done in post production?