Acquia\CloudApi\Client\CloudApi::getAllSiteNames PHP Method

    public function getAllSiteNames()
    {
        $sites = array();
        foreach ($this->creds as $key => $value) {
            if (is_array($value) && !empty($value['username']) && !empty($value['password'])) {
                $sites[] = $key;
            }
        }
        return $sites;
    }