[Spring boot] Spring Security 기존 로그인/로그아웃 커스터마이징

Securityconfig.java

@Bean
	public AuthenticationFailureHandler authenticationFailureHandler() {
		return new SimpleUrlAuthenticationFailureHandler("/member/login?error=true");
}

@Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http,
    	AuthenticationFailureHandler failureHandler) throws Exception {
        // -> CSRF 기능 비활성화
        http.csrf((csrf) -> csrf.disable());
        
        // 로그인 페이지 커스터마이징
        http.formLogin((formLogin) -> formLogin
        		.loginProcessingUrl("/member/login")
        		.usernameParameter("username")
        		.passwordParameter("password")
        		.defaultSuccessUrl("/")
        		.failureHandler(failureHandler));
        
        // 로그아웃 이후 이동할 페이지
        http.logout((logout) -> logout.logoutSuccessUrl("/"));
        
        return http.build();
    }

formLogin에서 .successHandler가 계속 에러남;;

login.html

<div class="my-2 card" style="padding: 0 30px 0 30px;">
	<div class="my-5 text-center">
    	<h1>Sign In</h1>

        <div class="card-body">
        	<form method="post" th:action="@{/member/login}">
            	<div class="my-2">
                	<div class="form-floating mb-4">
	                	<input type="text" class="form-control" name="username" placeholder="ID" required /> 
	                    <label for="floatingInput">ID</label>
	                </div>
                	<div class="form-floating mb-4">
	                	<input type="password" class="form-control" name="password" placeholder="PASSWORD" required />
	                    <label for="floatingPassword">PASSWORD</label>
	                </div>
                </div>

                <div class="mt-5 d-grid gap-2 d-md-flex justify-content-md-center">
	            	<input class="btn btn-info" type="submit" value="sign in" />
	            </div>
			</form>
		</div>
	</div>
</div>

로그인 잘 된다