Hey, I would say the best method still to implement custom auth is to use the “custom” auth provider. The only thing you will need to implement really are functions to retrieve the user (getCurrentUser) in src/lib/auth, and some way to sign in to linkedin/github/facebook/your own system.
While the solution linked above looks like a lot of work was put into it, and top marks for sharing it with the community, there are a few things I don’t quite agree with there that I can see such as, use of cookies, some potential security risks and not using the existing auth pattern that Redwood has built in - which means you don’t get a tonne of the new features that RW offers e.g. RBAC.
I wrote up a little bit more about implementing custom auth on this post: