Matt Raible
Angular has had pretty good backward compatibility since v5. What changed in the previous tutorial and this one was Spring Boot 2.0 vs Spring Boot 2.1. In 2.1, they added OIDC support directly to Spring Security, hence the property name changes. I wrote a post on Spring Boot 2.1 that might help. You might find Migrate Your Spring Boot App to the Latest and Greatest Spring Security and OAuth 2.0 useful as well.