At the start of your Threekit contract, you will receive two email invitations to sign up for your very own Threekit orgs: a Preview org and an Admin org. Just click the "Redeem invitation" link in that email and follow the prompts to set up your account.
Pro Tip 1: If you cannot find both of these emails, make sure you scroll down, as they are often combined into a single email thread in apps like Gmail.
Pro Tip 2: Make sure to click on the "Sign up" and not the "Sign in" option on the redemption screen.
Before you can start exploring the Threekit platform, you will need to add any additional users (including partners and Threekit project team members) to your org.
UPDATE: Major changes have been made to the way new users are added to the system.
Of particular note:
Please see the release notes here for more information.
To do this, simply click on the "Settings" tab in the left side bar, select "Members," and then click on the green "+ Invite new member" button in the upper right-hand corner.
Going forward, you can add and remove any users from this same "Members" tab as necessary.
Understand your technical service options with our Intro to Support article.