Tutorials on this subject :

Annotations in Java Spring Security

Create a custom login page

Secure a Web Application for Cross Site Request Forgery (CSRF)

Disable the CSRF

Implement Anonymous Login

My first Spring Boot Service using Spring Security

PUT, POST, DELETE, PATCH requests using CSRF in Postman

SPRING Security : Secure Web Application

Authentication : InMemoryUserDetailsManager

Authentication : JdbcUserDetailsManager

Authorization : SecurityFilterChain

Store Users & Passwords into a MySql database

Spring Security 6 : Implementing OAuth2 with Keycloak

Spring Security Overview

SPRING Security : Simple MVC Application (no security)

Total tutorials on this subject : 15