Adding a new 'managed' authentication method to Discourse

[thoka (Thomas Kalka)]

I would like to learn, if implementing an authenticator would be the right path towards

Simple login by email via deep links containing a username

I would like to lower the hurdle to login in our school forum by the following procedure: Links sent by mail to the (mostly non-public) forum should contain the username of the addressed user (like forum.my.tld/t/123#user=toka) If a not logged-in user opens this link, a page offers to send a login link by clicking a button. If clicked, a login with a login token should be sent to the user, which then allows them to open the target page without further interaction for a specific time. Ot…

Do I understand right, that all registered authenticators are called early in the app, so I could test therein, if a username and some hint for email authentication is included in the URL and render a “send me a login link” form as response?