title: Git cli: get user info from username
body: <p>Is there a way to get the name of the user, given only their username?</p>
  
  <p>Something like this output <code>git show &lt;username&gt;</code> (I know this doesn't work)</p>
  
  <pre><code>username: username
  name: First Last
  email: email@address
  </code></pre>
  
  <p>I know I can do this with a GitHub api call, but would prefer to keep it within the CLI.</p>