Zendesk\API\Resources\Core\Users::getValidSubResources PHP Method

    public static function getValidSubResources()
    {
        return ['groupMemberships' => GroupMemberships::class, 'groups' => Groups::class, 'identities' => UserIdentities::class, 'organizations' => Organizations::class, 'organizationMemberships' => OrganizationMemberships::class, 'organizationSubscriptions' => OrganizationSubscriptions::class, 'requests' => Requests::class, 'sessions' => Sessions::class, 'tickets' => UserTickets::class];
    }