title: Woocommerce: add a custom message on registration
body: <p>I'm trying to add a message on the "my account" page with woocommerce when somebody registers for the first time from the same page - I don't want to do it if somebody registers while paying for an order. </p>
  
  <p>I've been messing around for hours with filters and actions, and I can't manage to display my message just after the registration... The best thing I've managed to do with the function wc_add_notice is to display it but on every single part of "my account" page.</p>
  
  <p>I don't want the user to end up on a custom page, just add some kind of success message.</p>
  
  <p>Could someone help me with that? I'd like to do it myself, without paying for a plugin for such a simple thing.</p>