Create account checkbox doesn't hide if user already registered

[apaardev]

The create account checkbox should not be visible if the user is already registered.

[Tjitse-E]

@apaardev can you add some more info? Please add a steps to reproduce and an actual screenshot, the screenshot you've added is from the module docs.

[apaardev]

Ok.
Steps to reproduce:
Add product to cart
Go to checkout
Fill the email field with a registered user.

The create account checkbox is still visible.