Adding "Log In With Mastodon" to Auth0

I use Auth0 to provide social logins for the OpenBenches website. I don't want to deal with creating user accounts, managing passwords, or anything like that, so Auth0 is perfect for my needs. There are a wide range of social media logins provided by Auth0 - including the usual suspects like Facebook, Twitter, WordPress, Discord, etc. Sadly, there's no support for Mastodon. All is not lost…