diff --git a/account/serializers.py b/account/serializers.py
index d4b6179..d4fd335 100644
--- a/account/serializers.py
+++ b/account/serializers.py
@@ -144,12 +144,12 @@ class SuperUserSerializer(serializers.ModelSerializer):
     refresh_token = serializers.SerializerMethodField('get_refresh_token')
 
     def get_auth_token(self, obj):
-        refresh = RefreshToken.for_user(obj.auth)
+        refresh = RefreshToken.for_user(obj)
         access_token = str(refresh.access_token)
         return access_token
 
     def get_refresh_token(self, obj):
-        refresh = RefreshToken.for_user(obj.user)
+        refresh = RefreshToken.for_user(obj)
         refresh_token = str(refresh)
         return refresh_token