public async Task ListAllUsers()
{
var client = new B2CGraphClient("aeefcc33-b5b3-4997-90e9-817e0d91d068", Secret, "b6bdfb2f-60a9-48b4-9fa5-5c15a97e4ffb");
var users = await client.GetAllUsers();
Console.WriteLine(JObject.Parse(users).ToString(Formatting.Indented));
}