Curity OAuth Authenticator Archetype
· An archetype that generates the source code necessary to create an authenticator plug-in that communicates with an upstream OAuth or OpenID Connect provider
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 identityserver.plugins.archetypes.oauth-authenticator-3.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.