Added a custom user serializer to allow sorting of notes by user

project/accounts/serializers.py

@@ -0,0 +1,12 @@
+from django.contrib.auth.models import User
+from rest_framework import serializers
+from notes.models import Note
+
+
+class CustomUserSerializer(serializers.ModelSerializer):
+    notes = serializers.PrimaryKeyRelatedField(
+        many=True, queryset=Note.objects.all())
+
+    class Meta:
+        model = User
+        fields = ['id', 'username', 'notes']