| 1234567891011121314151617181920212223242526272829303132 | import osimport requestsclass OperationService:    base_url = os.environ.get('BILLING_API_URL', 'BILLING_API_URL')    secret_key = os.environ.get('BILLING_API_SECRET_KEY', 'BILLING_API_SECRET_KEY')    @classmethod    def _send_request(cls, method, endpoint, json=None, params=None):        headers = {            "Content-Type": "application/json",            "Billing-Api-Secret-Key": cls.secret_key        }        url = f"{cls.base_url}{endpoint}"        response = requests.request(method, url, json=json, params=params, headers=headers)        return response.json()    @classmethod    def record_utm(cls, tenant_id: str, utm_info: dict):        params = {            'tenant_id': tenant_id,            'utm_source': utm_info.get('utm_source', ''),            'utm_medium': utm_info.get('utm_medium', ''),            'utm_campaign': utm_info.get('utm_campaign', ''),            'utm_content': utm_info.get('utm_content', ''),            'utm_term': utm_info.get('utm_term', '')        }        return cls._send_request('POST', '/tenant_utms', params=params)
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