Add new users or delete users is easy in Storm Admin. It is also easy to set up different roles that will delimit the users possibilities in the system.
- Go to Settings > Users > Tools > New and start fill in mandatory fields then press Save
- Select Tools > Send reset password mail to send a mail with a link to the new user with instructions for how to create a password
- Here it's also possible to set different roles for each application
Users and applications
If your client consist of several application can you not create a user with the same Login name under the different applications.
Go to Settings > Users and on the right side of the user that you want to delete can you click on the X 
Deleted users can you find under Settings > Users > Tools > Show deleted
Roles makes it possible to set up different authorizations for different users. This overrides the settings under Components, see here.