def METHOD_NAME(apps, schema_editor):
    AquiferResource = apps.get_model('aquifers', 'AquiferResource')
    AquiferResource.objects.filter(create_date__isnull=True).update(create_date=datetime.datetime.now(utc))
    AquiferResource.objects.filter(update_date__isnull=True).update(update_date=F('create_date'))
    AquiferResource.objects.filter(
        Q(create_user__isnull=True) | Q(create_user='')).update(create_user=DATALOAD_USER)
    AquiferResource.objects.filter(
        Q(update_user__isnull=True) | Q(update_user='')).update(update_user=F('create_user'))