From GroupScript documentation
After you login as admin, go to My Account > Backend, and then open "Companies".
You can add companies here, and for each company you can also add users.
If user that is connected with a company logs in, then he will be able to do everything with this company:
- change company information
- add, change and delete campaigns for this company
- see statistics about company's campaigns
- export coupons from this company's campaigns