You can now create a "license" key via the Embeddable Admin Console.
This differs from a regular invitation in that you can limit the # of seats available.
Create The Invitation
First, you can follow the directions shown here on how to create the Invitation.
Add in License Key Data
To set up a license key, you will need two pieces of custom data: * license must be set to true * the # of seats available must be set.