Didn't receive my activation link after signing up
After you create your account you will need to click on the link that's sent to the email address you provided.
It's possible you didn't receive the email because you had a typo in your email address. Check also if maybe the activation email was put into your spam or junk mail folder, as it might have been placed there by your email provider.
If you didn't click on the link within three days you'll have to sign up again for a new account.