Obfuscate Java Jar with dependencies using Maven Proguard Plugin

Find out how a [login to view URL] should look like and what maven command line should use in order to create a java jar with dependencies where classes are obfuscated (I can not look inside the jar and read the classes code with a java Decompiler (not the original code but some cryptic stuff)) I started from the most simple Maven generated project and added a class that should be obfuscated There is no obfuscation after mvn clean install I attached an archive with the whole Maven / Intellij project