| 123456789101112131415161718192021222324252627282930 | 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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