To create your account on the Cambridge University Press website, you will need your SAM membership ID. To find that, sign in to this website. Click on My Profile at the top right. On your profile page, click on the dropdown box at the top right next to your picture and choose Account+Settings. Your SAM membership ID is listed in the Account Information section.
To set up your account with Cambridge, visit Cambridge Journals Online. Click on the Register Now link at the top right-hand side of the page. Complete the registration form by entering all of your required contact information, and by creating a new username and password for the account. Verify your email address by clicking on the activation link in the email that you will receive.
After activating your account, log in to the Cambridge site and click on My Profile at the top right then select My Societies from the menu on the left. Enter the Society ID (1003232) and your SAM membership ID in the box labeled Membership Number.