List on-calls

curl --request GET \
  --url https://api.rootly.com/v1/oncalls \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "type": "on_call_resources",
      "attributes": {
        "escalation_policy_id": "<string>",
        "escalation_policy_name": "<string>",
        "user_id": 123,
        "starts_at": "2023-11-07T05:31:56Z",
        "ends_at": "2023-11-07T05:31:56Z",
        "escalation_policy_path_id": "<string>",
        "escalation_policy_path_name": "<string>",
        "is_default_path": true,
        "escalation_level": 123,
        "schedule_id": "<string>",
        "schedule_name": "<string>"
      },
      "relationships": {
        "user": {
          "data": {
            "id": "<string>",
            "type": "users"
          }
        },
        "schedule": {
          "data": {
            "id": "<string>",
            "type": "schedules"
          }
        },
        "escalation_policy": {
          "data": {
            "id": "<string>",
            "type": "escalation_policies"
          }
        }
      }
    }
  ],
  "included": [
    {
      "id": "<string>",
      "type": "<string>",
      "attributes": {},
      "relationships": {}
    }
  ]
}