An admin user can add up to a total of 3 users. Any additional users have to be added by a Super Admin - just contact the Buzz360 support.
To add a user, follow this path
Settings (side Menu)
Users (top Menu)
Add an email address into the email field in the open card
Add the permissions you wish that new user to have.
Note: Be cautious with who you grant Admin rights to. An admin user add or delete users and they can export your records.