List active discovery sessions

{
  "meta": {
    "api_version": 1,
    "server_version": "0.19.6"
  },
  "success": true,
  "data": [
    {
      "daemon_id": "0f0cd6bf-ac90-457b-aa3f-6f24990d5ff6",
      "discovery_type": {
        "host_id": "eb4e20fc-2b4a-4d0c-811f-48abcf12b89b",
        "type": "SelfReport"
      },
      "phase": "AwaitingSnapshot",
      "progress": 0,
      "session_id": "1ffd059c-17ea-40a8-8aef-70fd0307db82",
      "site_id": "72771e6a-6f5e-4de4-a5b9-1266c4197811",
      "credential_results": [
        {
          "credential_id": "13c40afa-2996-4a0c-b2e9-68fba9462242",
          "outcome": {
            "hosts": 0,
            "type": "Collected",
            "hosts_with_guests_listed": [
              "d7355285-20ed-4937-93e6-56d490e60d03"
            ]
          }
        }
      ],
      "daemon_version": "string",
      "discovery_id": "cdd44607-512c-4795-96df-93dabc33c12d",
      "error": "string",
      "estimated_remaining_secs": 0,
      "finished_at": "2019-08-24T14:15:22Z",
      "hosts_discovered": 0,
      "last_update_at": "2019-08-24T14:15:22Z",
      "reason": "Completed",
      "scanned": {
        "binding_ids": [
          "b5aa1d90-55d4-4e37-ab54-062227ec8343"
        ],
        "found_subnet_ids": [
          "311dbb38-78e2-42f8-b62c-c104dfb59576"
        ],
        "host_ids": [
          "8bbfd9bb-c73d-4ba0-8646-be251d24b410"
        ],
        "interface_ids": [
          "513ddd9b-363c-404c-8d2f-e4772a6284ee"
        ],
        "ip_address_ids": [
          "c2bc70c8-b7ad-480c-92cd-16dcad15753f"
        ],
        "port_ids": [
          "954b3c9b-e9d3-45bb-a4a3-76cf69328728"
        ],
        "service_ids": [
          "f7eb01c9-d95f-476e-9338-df56032c0dac"
        ],
        "subnet_ids": [
          "942824b1-f36d-4404-96ac-b099828cf934"
        ],
        "vlan_ids": [
          "9d54a8f0-0127-444f-984f-03be3c3bb00d"
        ]
      },
      "started_at": "2019-08-24T14:15:22Z",
      "warnings": [
        {
          "address": "string",
          "code": "InterfaceSetCutShort",
          "collected": 0,
          "credential_id": "13c40afa-2996-4a0c-b2e9-68fba9462242",
          "snmp_version": "V1"
        }
      ]
    }
  ],
  "error": "string"
}