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Go to your email inbox and open the Activate your account email.
Click Activate account, you are redirected to the Set passphrase page.
Enter a strong passphrase and click Set, the applicable user agreement is displayed.
Review the user agreement.
Click Accept, you are redirected to the Sign-in page, and an Activation complete email containing your user name is sent to your email address.
You can now sign in with your user name and passphrase.