22. Learning outcomes: 
-bash-4.2$ pwd
/u/dgerman/apache/htdocs/spring-boot/fall2019/step20
-bash-4.2$ tree
.
+-- pom.xml
+-- src
    +-- main
    |   +-- java
    |   |   +-- com
    |   |       +-- example
    |   |           +-- demo
    |   |               +-- HomeController.java
    |   |               +-- Role.java
    |   |               +-- RoleRepository.java
    |   |               +-- SecurityConfiguration.java
    |   |               +-- SpringBoot20Application.java
    |   |               +-- SSUserDetailsService.java
    |   |               +-- User.java
    |   |               +-- UserRepository.java
    |   +-- resources
    |       +-- application.properties
    |       +-- templates
    |           +-- admin.html
    |           +-- index.html
    |           +-- login.html
    |           +-- secure.html
    +-- test
        +-- java
            +-- com
                +-- example
                    +-- demo
                        +-- SpringBoot20ApplicationTests.java

13 directories, 15 files
-bash-4.2$