Since you mention Persona: There is portier[0], a successor project (I'm part of the project). Login via email as default, or via your Google account for gmail

Since you mention Persona: There is portier[0], a successor project (I'm part of the project). Login via email as default, or via your Google account for gmail addresses, and other email domains could use their own login system. [0]: https://portier.github.io/ https://portier.github.io/