Horde_Imsp_Client_Base::logout PHP Method

    public abstract function logout();

 /**
  * Attempts to login to IMSP server.
  *
  * @param Horde_Imsp_Client_Base $client  The Imsp client connection.
  * @param boolean $login                  Remain logged in after auth?
  *
  * @return boolean
  */
 public function authenticate(Horde_Imsp_Client_Base $client, $login = true)
 {
     $this->_imsp = $client;
     if (!$this->_authenticate()) {
         return false;
     }
     if (!$login) {
         $this->_imsp->logout();
     }
     return true;
 }