title: Icon in bootstrap 4 inside the input
body: <p>I am looking for a solution to create and input like this one in bootstrap 4
  <a href="https://i.stack.imgur.com/eSjN5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/eSjN5.png" alt="Desired target"></a></p>
  
  <p>I am using font awesome and this is the code that I use</p>
  
  <pre><code>&lt;div class="input-group"&gt;
      &lt;label class="control-label"&gt;Username&lt;/label&gt;
      &lt;input type="text" class="form-control" placeholder="Username" /&gt;
      &lt;span&gt;
          &lt;i class="fa fa-user-circle-o" aria-hidden="true"&gt;&lt;/i&gt;
      &lt;/span&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>but i get the image out of the input
  Any help  please
  <a href="https://jsfiddle.net/5db2ho62/" rel="noreferrer">https://jsfiddle.net/5db2ho62/</a></p>