Get a planning increment by series and increment ids.
curl -X GET \ https://myaccount.leankit.com/io/series/1234/increment/56789 \ -H 'Authorization: Basic base64encodedauthhere'
200 OK
{
"id": "56789",
"label": "PI-1",
"planningSeriesId": "1234",
"startDate": "2022-01-01",
"endDate": "2022-01-31",
"parentPlanningIncrementId": null
}