def update(self, api_key=None, **kwargs):
        """
        Call the stripe API's modify operation for this model

        :param api_key: The api key to use for this request.
            Defaults to djstripe_settings.STRIPE_SECRET_KEY.
        :type api_key: string
        """
        api_key = api_key or self.default_api_key
        response = self.api_retrieve(api_key=api_key)
        return response.modify(response.stripe_id, api_key=api_key, **kwargs)

        Call the stripe API's modify operation for this model

        :param api_key: The api key to use for this request.
            Defaults to djstripe_settings.STRIPE_SECRET_KEY.
        :type api_key: string
        
djstripe/models/core.py