This package is made for the League's OAuth2 Client.
From command line:
composer require howlowck/meetup-oauth2-provider
$provider = new \Howlowck\OAuth2\Client\Provider\Meetup(array(
'clientId' => 'YOUR_CONSUMER_KEY',
'clientSecret' => 'YOUR_CONSUMER_SECRET',
'redirectUri' => 'your-redirect-url',
'scopes' => array('basic'),
));
For more consumption details, please refer to the readme on League's OAuth2 Client.