How Does Biff Authentication Work?

authentication is sort of like building. So you don't have to really configure a lot of stuff. How does the authentication happen? Or this is more like a firebase authentication where you need to set up the stuff on the back end. Yeah, so I currently, Biff provides one form of authentication, which is by email link. But if you want to use mail gun, you just need to get the API key and put it in your configuration.