To create new users:
Go to the Users and Groups property group.
Click on the Add new user button.
Define a new username, as shown above.
Repeat the process for other users you want to add.
As the image above shows:
Three (3) different policies are created and modified.
Nine (9) users are created, and their details (Name, Surname, Password) are defined.
Three (3) different user groups are created.