AbstractSecurityWebApplicationInitializer 또는 SecurityFilterAutoConfiguration로 자동으로 DeligatingFilterProxy를 등록 요청을 FilterChainProxy로 위임함 Filter들은 WebSecurity, HttpSecurity를 통해 만들어짐 The WebSecurity is created by WebSecurityConfiguration to create the FilterChainProxy known as the Spring Security Filter Chain (springSecurityFilterChain). The springSecurityFilterChain is the Filter that the Delegatin..