fix: 카카오 로그인 오류 수정

Author: sapiens2000

src/main/java/com/example/log4u/common/oauth2/dto/KakaoResponseDto.java

@@ -5,7 +5,7 @@
 import lombok.RequiredArgsConstructor;
 
 @RequiredArgsConstructor
-public class KakaoResponseDto implements OAuth2Response{
+public class KakaoResponseDto implements OAuth2Response {
 	@Override
 	public String getNickname() {
 		return "";
@@ -18,15 +18,14 @@ public String getProfileImageUrl() {
 
 	private final Map<String, Object> attribute;
 
-
 	@Override
 	public String getProvider() {
 		return "kakao";
 	}
 
 	@Override
 	public String getProviderId() {
-		return attribute.get("sub").toString();
+		return attribute.get("id").toString();
 	}
 
 	@Override