using LukeHagar.PlexAPI.SDK;
using LukeHagar.PlexAPI.SDK.Models.Components;

var sdk = new PlexAPI(accessToken: "<YOUR_API_KEY_HERE>");

var res = await sdk.Server.GetMyPlexAccountAsync();

// handle response

{
  "MyPlex": {
    "authToken": "Z5v-PrNASDFpsaCi3CPK7",
    "username": "example.email@mail.com",
    "mappingState": "mapped",
    "mappingError": "<string>",
    "signInState": "ok",
    "publicAddress": "140.20.68.140",
    "publicPort": 32400,
    "privateAddress": "10.10.10.47",
    "privatePort": 32400,
    "subscriptionFeatures": "federated-auth,hardware_transcoding,home,hwtranscode,item_clusters,kevin-bacon,livetv,loudness,lyrics,music-analysis,music_videos,pass,photo_autotags,photos-v5,photosV6-edit,photosV6-tv-albums,premium_music_metadata,radio,server-manager,session_bandwidth_restrictions,session_kick,shared-radio,sync,trailers,tuner-sharing,type-first,unsupportedtuners,webhooks",
    "subscriptionActive": true,
    "subscriptionState": "Active"
  }
}