Yes. If you don't have have one, then don't worry. You can go to the account login/register page (located in the top-right corner of the screen) to create an account, or wait until the checkout where it will automatically create one for you.
If you already have an account, then you can login with the account login/register page, or wait until you add you personal details in the checkout, where it will automatically log you in.
https://account.finish.co.uk
