如何获取Twitter粉丝列表（或任何其他Twitter查询）

My question is similar to one here - Twitter search by hashtag example API v1.1. I've followed the API and advice as best as I can but I'm still a bit stuck on this one and wondering if someone can spot what i've done wrong:

<?php
require_once('twitter-api-php-master/TwitterAPIExchange.php');

$consumer_key = 'xxxx';
$consumer_secret = 'xxxx';
$oauth_access_token = 'xxxx';
$oauth_access_token_secret = 'xxxx';

// Your specific requirements
$url = 'https://api.twitter.com/1.1/search/tweets.json';
$requestMethod = 'GET';
$getfield = '?q=#baseball&result_type=recent';

// Perform the request
$twitter = new TwitterAPIExchange($settings);
echo $twitter->setGetfield($getfield)
             ->buildOauth($url, $requestMethod)
             ->performRequest();
?>

It doesn't seem to be getting past ->buildOauth?? and isn't sending any messages to the screen. Can you see where I'm falling down?