You can use the Users application to manage users. User
records contain user names, passwords, and security profiles that
determine the applications, options, and data to which a user can
access.
Administrative users
Administrative users have full or restricted access to
the Security Groups application and to the Users application. Administrative
users are responsible for implementing and maintaining security services,
such as adding users, building profiles, or managing general site
administration.
Database users
Database users are granted access to read, insert, update,
and delete specific objects that define a set of fields and business
rules. These objects can also update one or more database tables.
System users
There are certain user IDs, like MAXADMIN and MAXREG, that
are required for the system to run properly. These user IDs are known
as system users