diff --git a/backend/backend/api.py b/backend/backend/api.py
index 3239ffc..7a692f9 100644
--- a/backend/backend/api.py
+++ b/backend/backend/api.py
@@ -1,5 +1,7 @@
 from rest_framework import viewsets, serializers, permissions
 from rest_framework import routers
+from rest_framework.response import Response
+from rest_framework import status
 
 from .models import ToDoList
 
@@ -9,12 +11,43 @@ class ToDoListSerializer(serializers.HyperlinkedModelSerializer):
         model = ToDoList
         fields = ["title", "created_at"]
 
+class WriteToDoListSerializer(serializers.Serializer):
+    class Meta:
+        model = ToDoList
+        fields = ["title", "created_at", "user"]
+    
+    def create(self, validated_data):
+        return ToDoList.objects.create(**validated_data)
+
+    def update(self, instance, validated_data):
+        instance.title = validated_data.get('title', instance.title)
+        instance.user = validated_data.get('user', instance.user)
+        instance.save()
+        return instance
 
 class ToDoListViewSet(viewsets.ModelViewSet):
-    queryset = ToDoList.objects.all()
     serializer_class = ToDoListSerializer
     permission_classes = [permissions.IsAuthenticated]
+    def get_queryset(self):
+        queryset = ToDoList.objects.all()
+        print(type(queryset), queryset.__dict__)
+        user = self.request.user
+        print(type(user), user.__dict__)
+        return queryset.filter(user=user)
+    
+    def create(self, request):
+        data = {
+            'user': request.user,
+            'title': request.data['title'],
+        }
+        serializer = WriteToDoListSerializer(data=data)
+        print(serializer.__dict__)
+        if serializer.is_valid():
+            serializer.save()
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        else:
+            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
 
 router = routers.DefaultRouter()
-router.register(r"lists", ToDoListViewSet)
+router.register(r"lists", ToDoListViewSet, basename="ToDoList")