build.gradle 스프링 시큐리티 관련 추가 https://mvnrepository.com/artifact/org.springframework.security/spring-security-core implementation 'org.springframework.security:spring-security-core:5.6.2' implementation 'org.springframework.security:spring-security-config:5.6.2' //컨비그 implementation 'org.springframework.security:spring-security-taglibs:5.6.2' //태그 라이브러리 implementation 'org.springframework.security..