How to download audit logs in openflow?

I almost forgot the delete part.
If you just want to delete all workflow instances, you can import this into a nodered instance.

[
    {
        "id": "b85abd5a81311fd1",
        "type": "inject",
        "z": "9e73f64b7c3502dd",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 540,
        "y": 40,
        "wires": [
            [
                "e89f87b343a7f915"
            ]
        ]
    },
    {
        "id": "e89f87b343a7f915",
        "type": "api delete many",
        "z": "9e73f64b7c3502dd",
        "name": "",
        "query": "{\"_type\": \"workflowinstance\"}",
        "querytype": "str",
        "collection": "openrpa_instances",
        "collectiontype": "str",
        "x": 710,
        "y": 40,
        "wires": [
            []
        ]
    }
]