fix: 로그인 안된 상태 코드 500_3으로 변경

Api/src/main/java/com/example/api/config/SecurityConfig.java

@@ -55,7 +55,7 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
         http.authorizeRequests()
                 .requestMatchers("/api/auth/**").permitAll()
                 .requestMatchers( "/api/swagger-ui/**", "/api/v3/api-docs/**").permitAll()
-                .requestMatchers("/api/**").authenticated();
+                .requestMatchers("/api/**").authenticated().and().anonymous().disable();
 
         http.apply(filterConfig);
 

Api/src/main/java/com/example/api/config/security/SecurityUtil.java

@@ -1,13 +1,15 @@
 package com.example.api.config.security;
 
+import com.example.error.exception.SecurityContextNotFoundException;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.context.SecurityContextHolder;
 
 public class SecurityUtil {
     public static Long getCurrentUserId() {
         Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+
         if (authentication == null) {
-            throw new IllegalArgumentException("잘못된 접근");
+            throw SecurityContextNotFoundException.EXCEPTION;
         }
         return Long.valueOf(authentication.getName());
     }

Api/src/main/java/com/example/api/user/service/GetUserGenresUseCase.java

@@ -0,0 +1,4 @@
+package com.example.api.user.service;
+
+public class GetUserGenresUseCase {
+}

Core/src/main/java/com/example/error/exception/SecurityContextNotFoundException.java

@@ -0,0 +1,13 @@
+package com.example.error.exception;
+
+import com.example.error.BaseErrorException;
+import com.example.error.GlobalErrorCode;
+
+public class SecurityContextNotFoundException extends BaseErrorException {
+
+    public static final BaseErrorException EXCEPTION = new SecurityContextNotFoundException();
+
+    private SecurityContextNotFoundException() {
+        super(GlobalErrorCode.SECURITY_CONTEXT_NOT_FOUND);
+    }
+}