Spring Authorization Server
[spring-security-oauth2-authorization-server:0.4.3-SNAPSHOT](https://docs.spring.io/spring-authorization-server/docs/0.4.3-SNAPSHOT/reference/html/getting-started.html)
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window jdevelops-authentication-sas-2.0.7.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
