title: Create Unique Account number for every user that registers to the system using Woocommerce My account page
body: <p>I am trying to provide a unique account number to every new user that registers into our woocommerce store so for that i tried to do update_user_meta and this is the code that i tried but no go so please assist</p>
  
  <pre><code>add_action('user_register', 'vmart_add_account_number', 10, 1);
  
  function vmart_add_account_number($user_id)
  {
      $accountnumber = 1;
      update_user_meta($user_id, 'account_number', $accountnumber);
  }
  </code></pre>
  
  <p>I am not able to create the custom field and only after that I can think of making it unique so please assist..</p>