Adding users to your Seller.Tools account is quick and easy.
Simply go to the bottom left corner of your account and click "settings" and then click "sub accounts".
Once there you can invite the person you'd like to add as a sub-account via email address. They will receive the invite and you will be notified when they accept.
Once they accept you can go in and use the "edit" button to give specific permissions for that sub-account.
Then simply click save and you are all set.