Go to "Account Settings" (click the three dots in top right corner).
Click the "Team" option.
Click the "Create Team" button.
Select monthly or annual billing, then the number of accounts you need. Then click "Continue to Payment"
On the "Team" screen you can invite users to your account (credits show on the right side of screenshot). You can also purchase additional accounts for more users (shown on the left side of screenshot).
Now you can add team members to your team account. Click here to view the article.