Missing XboxLiveUser script

I have all the things I need to make my Xbox Live unity game, but when I try to make a script that says XboxLiveUser it says “The type or namespace name ‘XboxLiveUser’ does not exist in the namespace ‘Microsoft.Xbox.Services.System’ (are you missing an assembly reference?)” and "The type or namespace name ‘Windows’ could not be found (are you missing a using directive or an assembly reference?)
". These are the things it points towards

Microsoft.Xbox.Services.System.XboxLiveUser m_user = new
Microsoft.Xbox.Services.XboxLiveContext m_xboxLiveContext = null;
Windows.UI.Core.CoreDispatcher UIDispatcher = null;

Also when I import the prefab XboxLiveUser into my scene, in the inspector it says “Missing (Mono Script)”

Did something go wrong when importing the newest unity asset, also I re-imported a ton of times cus this same error keeps on happening.

Same problem here. Help by Microsoft is appalling, especially as they’re ditching UWP in order to force people to pay for a Unity Pro Licence.