Scratch oauth (probably already been suggested)
Magic link login, similar to ecosia
Login with wasteof, like the sign in with google
Share to wasteof, like those share to tw****r links you see sometimes
I’ll make some mock-ups for the buttons if you want
for scratch oauth, i don’t trust the security (of scratch, or a third party provider), magic are (in my opinion) useless.
i am interested in making wasteof into an oauth provider though
you don’t have to if you dont want to.. i’m thinking of making it like the github one