title: Pre-fill Woocommerce checkout fields with Url variable before session created
body: <p>I have wordpress site running woocommerce with a few products. I want to send my customer a url to their product which includes their name and email so i can pre-fill name and email on woocommerce checkout page. the link will take customer to the product item page, where they can view product details and click "add to cart".</p>
  
  <p>Link example: <code>http://example.com/product/myitem/tu_em=name@example.com&amp;tu_name=theFirstName</code> </p>
  
  <p>I tried to use <a href="https://stackoverflow.com/questions/50356459/pre-fill-woocommerce-checkout-fields-with-url-variables-saved-in-session/50357363#50357363">Pre-fill Woocommerce checkout fields with Url variables saved in session</a> answer code but you need to already have a woocommerce session created, which doesnt happen until you click "add to cart"</p>
  
  <p>How can i pre-fill my checkout fields page from the url to a product item?</p>