How to use the recurly.js function in recurly

def render(self):
        """ Fetch the subscription details from Recurly and create Salesforce objects.
            Then, redirec the user to the thank you page """

        # SFAPI: Uses 5 calls to register donation in Salesforce, ~2,000 recurring 
        # subscription creations per day with the standard nonprofit 10k calls per day

        token = self.request.form.get('recurly_token')

        if not token:
            return 'ERROR: No token provided'

        # workaround for http://bugs.python.org/issue5285, map unicode to strings
        settings = get_settings()
        recurly.API_KEY = str(settings.recurly_api_key)
        recurly.js.PRIVATE_KEY = str(settings.recurly_private_key)
        # Set a default currency for your API requests
        recurly.DEFAULT_CURRENCY = 'USD'

        sub = recurly.js.fetch(token)
        account = sub.account()
        billing_info = account.billing_info
        email = account.email.lower()

        street_address = billing_info.address1
        if billing_info.address2:
            street_address = '%s\n%s' % (street_address, billing_info.address2)

        # Look for an existing Plone user
        mt = getToolByName(self.context, 'portal_membership')

        res = get_brains_for_email(self.context, email, self.request)

# SFAPI: Uses 5 calls to register donation in Salesforce, ~2,000 recurring 
        # subscription creations per day with the standard nonprofit 10k calls per day

        token = self.request.form.get('recurly_token')

        if not token:
            return 'ERROR: No token provided'

        # workaround for http://bugs.python.org/issue5285, map unicode to strings
        settings = get_settings()
        recurly.API_KEY = str(settings.recurly_api_key)
        recurly.js.PRIVATE_KEY = str(settings.recurly_private_key)
        # Set a default currency for your API requests
        recurly.DEFAULT_CURRENCY = 'USD'

        sub = recurly.js.fetch(token)
        account = sub.account()
        billing_info = account.billing_info
        email = account.email.lower()

        street_address = billing_info.address1
        if billing_info.address2:
            street_address = '%s\n%s' % (street_address, billing_info.address2)

        # Look for an existing Plone user
        mt = getToolByName(self.context, 'portal_membership')

        res = get_brains_for_email(self.context, email, self.request)
        # If no existing user, create one which creates the contact in SF (1 API call)
        if not res:
            data = {
                'first_name': account.first_name,