Looking for a passwordless authentication system

I’m looking for an authentication system that works like this: You type in your e-mail address, you get an e-mail with a link that signs you in and keeps you signed in on that device until you explicitly log out.

The closest thing I find to this is auth0 passwordless. But this isn’t perfect because you still need to enter a code, rather then automatically getting logged in, and it relies on a third party. I’d like an open source tool, that doesn’t rely on any third party.