https://medium.com https://medium.com uses it. And I'm working on a little project myself which will use this way of login. About the frequency: there aren't m

https://medium.com https://medium.com uses it. And I'm working on a little project myself which will use this way of login. About the frequency: there aren't many situations where a user has access to your application, but not to email. I've been thinking about that, but when you have access to a browser, (most of the times) you have access to your mail.