To provide an employee/team member with access to PSA, you must add them as a User. In PSA, each user is uniquely identified with a username, password. Users are physical persons who work for the organization. They work on a project, enter time in their timesheets, and ensure that the project is completed on time.
You can also decommission or suspend users, if you don't want them to have access to the system.
For further details refer to:
Tip:
If you are newly implementing PSA, the following key Organization Breakdown Structure (OBS) components should be configured before adding users:
Note: * Business Unit, Team, Title and Role Setup are optional.