Java tutorial: "Build a Spring Boot App with User Authentication" is no longer available

Current Behavior

The link https://scotch.io/tutorials/build-a-spring-boot-app-with-user-authentication is currently unavailable.
It looks like the author no longer maintains the website.

Possible Solution

found some kind of placeholder site for the tutorials in that domain.
http://69.55.55.229/tutorials/build-an-ionic-app-with-user-authentication