How can i create sub-accounts?

The easiest and fastest way to create a sub user, is to click the “My account” panel (top right corner, and on the new window that will open click on the  “Sub accounts” tab, which is highlighted with red square in the image below. 

Then you can click the “+” button at the left corner

After you click the “Add” button the following window will show up.

Now you can  create sub-users and fill in the text fields with their email, password, expiration date and many more.