Set password upon creation.

First off: Great EDD add-on! ??

I am using EDD combined with Auto Register, Licensing and Support Tickets.
When a new user has been created and a license key generated, I now programmatically change the random password to their license key by hooking into ‘edd_sl_store_license’.

Yet, then the user’s password is changed as soon as they buy an additional license for any of the products.

Is there a hook/action/filter within EDD AR I can use to only trigger my password change upon creation of a new user?

Or to be more exact: right after the new user has been created by EDD AR, but before EDD sends to payment confirmation email.