스프링 시큐리티 강제로그인 코드

[codingspecialist]

    PrincipalDetail principalDetail = new PrincipalDetail(kakaoUser);
    SecurityContext securityContext = SecurityContextHolder.getContext();
    Authentication authentication = new UsernamePasswordAuthenticationToken(principalDetail, principalDetail.getPassword(), principalDetail.getAuthorities());
    securityContext.setAuthentication(authentication);
    HttpSession session = request.getSession();
    session.setAttribute(HttpSessionSecurityContextRepository.
            SPRING_SECURITY_CONTEXT_KEY, securityContext);