title: PHP: Google Service autoloader not finding classes
body: <p>I have the following in my composer.json (unrelated packages not shown):</p>
  <pre><code>&quot;require&quot;: {
      &quot;googleads/googleads-php-lib&quot;: &quot;^39.0&quot;,
      &quot;google/apiclient&quot;: &quot;2.7.2&quot;,
      &quot;google/cloud-storage&quot;: &quot;^1.23&quot;,
      &quot;googleads/google-ads-php&quot;: &quot;^14.0&quot;,
      &quot;phpseclib/phpseclib&quot;: &quot;2.0.31&quot;
  }
  </code></pre>
  <p>I have confirmed that the vender/autoload.php is being invoked. But when I use this code:</p>
  <pre><code>    $default_scope_set = array(
                                  Google\Service\Plus::PLUS_LOGIN,
                                  Google\Service\Plus::PLUS_ME,
                                  Google\Service\Plus::USERINFO_EMAIL,
                                );
  </code></pre>
  <p>I get the error:</p>
  <pre><code>Error: Class 'Google\Service\Plus' not found in /home/httpd/idxv3/lib/GoogleAuthenticator.php:38
  </code></pre>
  <p>I just cannot figure out where I went wrong. Any thoughts?</p>