How the HECK do I use ActiveDirectoryClient.cs

var ClientSecret = "kSRsdf7rU323rf2ff2gfdssfdAnKI1mcOf98djfidIGx38="; // A key you add for your AAD app.
var ClientId = "17dfab36-1c33-4ffe-9ddd-533ddddfs378"; // The unique identifier for your AAD app..

var userObjectId = "12345667-1234-1234-1234-123412341234"; // LET'S SAY YOU WANNA GET A USER'S GROUPS... You'll need their ObjectId for querying later.

var authority = "https://login.microsoftonline.com/{tenant guid}/oauth2/authorize?api-version=1.0"; // This is the "OAuth Authorize" Endpoint for your AAD app.
var authContext = new AuthenticationContext(authority);

// Graph endpoint comes from Azure Portal "Graph Connection Endpoint"
var client = new ActiveDirectoryClient(new Uri("https://graph.windows.net/{tenant guid}"), () =>
{
	var credential = new ClientCredential(ClientId, ClientSecret);
	var result = authContext
		.AcquireToken(
			"https://graph.windows.net", // NFI about this; just do it.
			credential)
		.AccessToken;
	return Task.FromResult(result);
});

var user = await client.Users.GetByObjectId(userObjectId).ExecuteAsync();

var allUsers = await client.Users.ExecuteAsync();
allUsers.Dump();

var allGroups = await client.Groups.ExecuteAsync();
allGroups.Dump();