SpringBootFindSomethingViaJpaRepository

This repository shows the situation mentioned on stackoverflow.com:

findFirstByOrderByUsernameAsc(String username) causes build failure in my code

https://stackoverflow.com/questions/79543991/findfirstbyorderbyusernameascstring-username-causes-build-failure-in-my-code

An objective is to add more usable examples to the documentation to save some time when using the examples.