title: What is a GitHub App's Integration ID in ghinstallation?
body: <p>I am trying to create a GitHub App in Golang by using a library named <a href="https://github.com/bradleyfalzon/ghinstallation" rel="nofollow noreferrer">ghinstallation</a>. As the description showed below, Integration ID and Installation ID are required. </p>
  
  <pre><code>// Wrap the shared transport for use with the integration ID 1 authenticating with installation ID 99.
  itr, err := ghinstallation.NewKeyFromFile(tr, 1, 99, "2016-10-19.private-key.pem")
  if err != nil {
      log.Fatal(err)
  }
  </code></pre>
  
  <p>I think the Installation ID is exactly the ID appears in the URL(<code>https://github.com/settings/installations/:installation_id</code>). 
  However, I've no idea what the Integration ID is.</p>