[이민권] guest 계정에 link 걸면 guest link는 제거하도록 수정

core/service.go

@@ -422,11 +422,14 @@ func (sh *serviceDescription) link(w http.ResponseWriter, r *http.Request) {
 
 	if guestlink {
 		//기존 게스트 링크 삭제
-		guestLinkId, err := primitive.ObjectIDFromHex(oldId)
+		link, err = sh.mongoClient.FindOneAndDelete(CollectionLink, bson.M{
-		if err == nil {
-			_, err = sh.mongoClient.Delete(CollectionLink, bson.M{
 			"platform": oldType,
-				"_id":      guestLinkId,
+			"uid":      oldId,
+		}, options.FindOneAndDelete().SetProjection(bson.M{"_id": 1}))
+
+		if err == nil {
+			sh.mongoClient.Delete(CollectionAccount, bson.M{
+				"_id": link["_id"].(primitive.ObjectID),
 			})
 		}
 	}