How to turn off WooCommerce user registration and manually create accounts?

I built an online store with WooCommerce. Now, I would like to disable WooCommerce user registration and register accounts manually. I want my store to be visible for everyone, but people should only be able to purchase something when they have an account that I created for them. How do I do this?

Just disable customer registration on WooCommerce->Settings->Accounts page.

if you want to prevent checkout for not logged in users, uncheck WooCommerce->Settings->Checkout->Enable guest checkout