https://spring.io/guides/topicals/spring-security-architecture/
    !!!

https://github.com/eugenp/tutorials/tree/master/spring-security-rest
https://www.toptal.com/spring/spring-security-tutorial

2023
ManishSharma
    https://www.javadevjournal.com/spring-security-tutorial/
    https://www.javadevjournal.com/spring-security/spring-security-authorization/