No. If you’re asked for an invitation code, it may be because you’ve already joined. If that’s the case, you should be able to log in and start exploring your perks.
If you haven’t yet joined, please ensure you follow the correct joining process. There’s a button in your online account which contains a special link that’s unique to you. Click that button and complete the form by entering your details, then scroll down and click ‘Sign up’. Do not click the ‘Sign up’ button at the top of the page or navigate anywhere else without completing the form.
If you try to join via any other route, it will ask you for an invitation code and you’ll be unable to sign up.