Xero php api基本公共连接

A few of the xero api's on github (calcinai/xero-php) talk about using composer.

Is it possible to use xero api without installing composer? If so I haven't worked out how...

This is what I have at the moment using the above mentioned package, not using my exact $config settings.

$config =  [
    'oauth' => [

        'callback'        => "https://www.website.com.au/test.php",

        'consumer_key'      => '00000000000000000000',
        'consumer_secret'   => '00000000000000000000',


        'signature_location'  =>\XeroPHP\Remote\OAuth\Client::SIGN_LOCATION_QUERY,
    ],
    'curl' => [
        CURLOPT_USERAGENT   => 'XeroPHP Sample App',
        CURLOPT_CAINFO => 'src/XeroPHP/certs/ca-bundle.crt'
    ]
];


$xero = new src\XeroPHP\Application\PublicApplication($config);


$contacts = $xero->load(Contact::class)->execute();

foreach ($contacts as $contact) {
    print_r($contact);
}