SimpleBrowser::authenticate PHP Method

    public function authenticate($username, $password)
    {
        if (!$this->page->getRealm()) {
            return false;
        }
        $url = $this->page->getUrl();
        if (!$url) {
            return false;
        }
        $this->user_agent->setIdentity($url->getHost(), $this->page->getRealm(), $username, $password);
        return $this->retry();
    }