private function prepare()
{
\phpCAS::client(CAS_VERSION_2_0, $this->casUrl, $this->casPort, $this->casUri, false);
//\phpCAS::setDebug('/tmp/cas.log');
\phpCAS::setNoCasServerValidation();
//\phpCAS::setSingleSignoutCallback(array($this, 'casSingleSignOut'));
//\phpCAS::setPostAuthenticateCallback(array($this, 'casPostAuth'));
\phpCAS::handleLogoutRequests(true, $this->casAllowedIpClients);
}