ZuMoGetCurrentUser.cs

public static async Task<ZuMoLoginProviderCredentials> GetCurrentUser(this ApiController controller)
{
	ServiceUser serviceUser = controller.User as ServiceUser;

	if (serviceUser != null)
	{
		var identity = await serviceUser.GetIdentitiesAsync();
		var credentials = identity.OfType<ZuMoLoginProviderCredentials>().FirstOrDefault();

		return credentials;
	}

	return null;
}