async def METHOD_NAME():
    # Count except cardio event source
    source_id = f"@{tracardi.cardio_source}"
    query = {
        "size": 0,
        "query": {
            "bool": {
                "must": [
                    {
                        "range": {
                            "metadata.time.insert": {
                                "gt": "now-15m"
                            }
                        }
                    }
                ],
                "must_not": [
                    {
                        "term": {
                            "source.id": source_id
                        }
                    }
                ]
            }
        },
        "aggs": {
            "sessions": {
                "cardinality": {
                    "field": "session.id",
                    "precision_threshold": 100
                }
            }
        }
    }
    return await storage_manager('event').query(query)