How do my stuff show up on my account I purchased last night idk how u put on my IMVU?

Question: When will I receive my products?

Answer: Products are delivered within 48 hours after payment through our site's built-in systems. Within 48 hours after payment, you will receive a private message in your mafia inbox leading you through the delivery process. The 48 hours start once the payment has reached our end. Orders may be delayed by holidays. You may request expedited delivery from sellers. Some of our sellers do offer faster delivery for a small fee.

Source: http://www.imvumafias.org/community/faq.php#f0r0

Giving us your ingame username would be a security risk. If our server ever got confiscated ... the last thing you want on it is a bunch of IMVU usernames sitting in our database. Instead, you will press a "use product" button on our site ... and it will simply send the product to whatever IMVU account your IMVU client is currently logged into, or you will give a gift code to your partner if the product is for them.