curl --request GET \
  --url https://localhost/api/v2/sessions/ \
  --header 'X-Cockroach-API-Session: <api-key>'

{
  "errors": [
    {
      "message": "<string>",
      "node_id": 123
    }
  ],
  "next": "<string>",
  "sessions": [
    {
      "active_queries": [
        {
          "id": "<string>",
          "is_distributed": true,
          "phase": 123,
          "progress": 123,
          "sql": "<string>",
          "sql_no_constants": "<string>",
          "start": "2023-11-07T05:31:56Z",
          "txn_id": [
            123
          ]
        }
      ],
      "active_txn": {
        "alloc_bytes": 123,
        "deadline": "2023-11-07T05:31:56Z",
        "id": [
          123
        ],
        "implicit": true,
        "is_historical": true,
        "max_alloc_bytes": 123,
        "num_auto_retries": 123,
        "num_retries": 123,
        "num_statements_executed": 123,
        "priority": "<string>",
        "read_only": true,
        "start": "2023-11-07T05:31:56Z",
        "txn_description": "<string>"
      },
      "alloc_bytes": 123,
      "application_name": "<string>",
      "client_address": "<string>",
      "id": [
        123
      ],
      "last_active_query": "<string>",
      "last_active_query_no_constants": "<string>",
      "max_alloc_bytes": 123,
      "node_id": 123,
      "start": "2023-11-07T05:31:56Z",
      "username": "<string>"
    }
  ]
}