fix(django): update interface for insertion

api/desecapi/serializers.py

@@ -1,9 +1,8 @@
 from rest_framework import serializers
 from desecapi.models import Domain, Donation
 
-
 class DomainSerializer(serializers.ModelSerializer):
-    owner = serializers.Field(source='owner.email')
+    owner = serializers.ReadOnlyField(source='owner.email')
     name = serializers.RegexField(regex=r'^[A-Za-z0-9\.\-]+$')
 
     class Meta: