The staff roster (https://app.5starstudents.com/Staff) is independent from user access.
Individuals on the roster are eligible to be checked into events, earn points, etc, but they cannot log into the system as a user.
User access is handled by designated school managers, who can invite staff members to create an account. This includes assigning an access role that determines what the individual can see and do within the program.
A group of users can be invited together, using the "Multiple Users" option and entering email addresses (https://app.5starstudents.com/Manager/AddUser).
More information about inviting users is available in this article