Of course, and it's completely free!
To add a new user, follow these steps:
1. Click on the "Users" tab from the left bar.
2. Once on the Users page, hit the "Add User" button at the top right corner.
3. You will be prompted to fill in the new user's details and set his permissions here.
4. When entering the required information, hit the Save button.
Once the new user has been created, they will receive an invitation to their email address to create their account. As the user is now part of the system, they will need to create a password to access the system.