List channels

{
  "ok": true,
  "data": [
    {
      "id": "9a8b7c6d-5e4f-4321-8a0b-1c2d3e4f5a6b",
      "realm_id": "5b0c3a7e-2f4d-4b8e-9a51-7c1d2e3f4a5b",
      "org_id": null,
      "user_id": null,
      "name": "ops-slack",
      "destinations": [
        {
          "type": "slack",
          "webhook_url": "https://hooks.slack.com/services/T000/B000/XXXX"
        }
      ],
      "enabled": true,
      "created_at": 1759000000000,
      "updated_at": 1759000000000,
      "rule_count": 1,
      "system_key": null,
      "locked": false,
      "lock_reason": null
    }
  ]
}

{
  "ok": false,
  "error": {
    "code": "unauthorized",
    "message": "Authentication required"
  }
}

{
  "ok": false,
  "error": {
    "code": "forbidden",
    "message": "You do not have access to do this"
  }
}

{
  "ok": false,
  "error": {
    "code": "not_found",
    "message": "Not found"
  }
}

{
  "ok": false,
  "error": "org_id: org_id is required when listing account channels",
  "code": "invalid_params"
}

{
  "ok": false,
  "error": "Internal server error",
  "code": "internal_error"
}