I just puchersed 'Ultimate Facebook'. My website is still has the wpengine on the URL, so

I just purchased 'Ultimate Facebook'. But My website still has the wpengine on the URL (oracletalk.wpengine.com),I will remove it when the site is ready to be live (oracletalk.com) so I was wondering when i link facebook to my site with 'ultimate facebook' does it matter if wpengine is on the URL or not? and if so is it possible to update it to the proper URL later?

thank you so much!!!