Feat: 커스텀 로그인 객체 처리 부분 리팩토링

#45 - feat: 커스텀 로그인 객체를 받을 수 있도록 메소드 추가 (#46)

src/main/java/cotato/bookitlist/config/security/jwt/AuthDetails.java

@@ -1,14 +1,14 @@
 package cotato.bookitlist.config.security.jwt;
 
-import java.util.Collection;
-import java.util.Collections;
-
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.security.core.userdetails.UserDetails;
 
+import java.util.Collection;
+import java.util.Collections;
+
 @AllArgsConstructor
 @Getter
 public class AuthDetails implements UserDetails {
@@ -51,4 +51,8 @@ public boolean isCredentialsNonExpired() {
     public boolean isEnabled() {
         return true;
     }
+
+    public Long getUserId() {
+        return Long.parseLong(userId);
+    }
 }