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

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

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

// handle response

{
  "MediaContainer": {
    "size": 151,
    "identifier": "com.plexapp.system.devices",
    "Device": [
      {
        "id": 1,
        "name": "iPhone",
        "platform": "iOS",
        "clientIdentifier": "<string>",
        "createdAt": 1654131230
      }
    ]
  }
}