How to find the administrative district and district by coordinates?

Question

2GIS

It is necessary to find the administrative district and district by coordinates through 2GIS.
I have included the API.

<script src="https://maps.api.2gis.ru/2.0/loader.js?pkg=full"></script>

Next, I try to find a geopoint in order to determine the administrative district and district through its properties. I took the code for the test from the examples of 2GIS itself:

DG.then(function () {
  var moscow = new DG.GeoPoint(37.617634, 55.755787);
})

I get an error: "TypeError: DG.GeoPoint is not a constructor"
What's wrong? And how to find the administrative district and district?...