Go to Shiptory→ and click the Sign up button on the top right corder. This will take you to the sign-up screen where you need to fill out the required information. Make sure all fields are filled correctly.
Once you click the Sign Up button at the bottom, you will receive an email to confirm your subscription. Follow the instructions in the email to complete registration.
Note that the link in the email will expire in 24 hours and the whole process needs to be repeated if you do not confirm within this period.