title: Laravel stop events propagation
body: <p>I have registered two <strong>queued</strong> event handlers on an event : </p>
  
  <pre><code>// in app/Providers/EventServiceProvider.php
  //...
  
  'App\Events\UserWasCreated' =&gt; [
      'App\Handlers\Events\RegisterInSalesForce',
      'App\Handlers\Events\SendMailToAdmin',
  ],
  </code></pre>
  
  <p>I want to run <code>SendMailToAdmin</code> only if <code>RegisterInSalesForce</code> is OK. I tried to return <code>false</code> in <code>RegisterInSalesForce</code> on failure and <code>true</code> on success but it does not work. </p>
  
  <p>What should I do ? Did I miss something ?</p>