title: How to add user's first name in Order Processing Email (woocommerce)
body: <p>I am trying to add user's first name to the order processing email; using this template.
  <a href="https://github.com/woocommerce/woocommerce/blob/master/templates/emails/customer-processing-order.php" rel="nofollow noreferrer">customer-processing-order.php</a></p>
  
  <p>I am trying to output "Hi Users_First_Name" before "Your order has been received and is now being processed..."</p>
  
  <p>I tried several ways to include order object but nothing worked.</p>
  
  <p>Please help.</p>