1. 문제 발견 WebSecurityConfigurerAdapter를 사용할 수 없음 2. 문제 이유 https://spring.io/blog/2022/02/21/spring-security-without-the-websecurityconfigureradapter Spring Security without the WebSecurityConfigurerAdapter In Spring Security 5.7.0-M2 we deprecated the WebSecurityConfigurerAdapter, as we encourage users to move towards a component-based security configuration.
