/**
     * Sends a new direct message to the specified user from the authenticating user.
     * Requires both the user and text parameters. Returns the sent message in the requested format when successful.
     *
     * @return  array
     * @param   string $text                    The text of your direct message. Be sure to URL encode as necessary, and keep it under 140 characters.
     * @param   string[optional] $id            Specifies the ID or screen name of the user for whom to return results for.
     * @param   string[optional] $userId        Specfies the screen name of the user for whom to return results for. Helpful for disambiguating when a valid screen name is also a user ID.
     * @param   string[optional] $screenName    Specfies the ID of the user for whom to return results for. Helpful for disambiguating when a valid user ID is also a valid screen name.
     */
    public function directMessagesNew($text, $id = null, $userId = null, $screenName = null)
    {
        // validate
        if($id == '' && $userId == '' && $screenName == '') throw new TwitterException('Specify an id or an userId or a screenName.');