title: how to put opencart 3.0 customer name on header?
body: <p>Can Any one help me how to display customer name in header after 
  customer's login</p>
  
  <p>I also try some code but dosen't work 
  in <code>controller&gt;common&gt;header.php</code></p>
  
  <pre><code>$data['customer_firstname'] = $this-&gt;customer-&gt;getFirstName();
  $data['customer_lastname'] = $this-&gt;customer-&gt;getLastName();
  </code></pre>
  
  <p>Thank you in advance</p>