title: Remove a laravel passport user token
body: <p>In my unit test, I have a user for whom I generate a token:</p>
  
  <pre><code>$tokenString = $this-&gt;user-&gt;createToken('PHPunit', ['example'])-&gt;accessToken;
  </code></pre>
  
  <p>How can I afterward delete this user's token?</p>