Navigate to Control panel - User Accounts.
In the screen that opens, select User from the Mamut eZ Publish menu and click Create here.
Enter the user's name, password, e-mail, signature, and image.
Click Publish.
In the user list, you can now assign user access roles
to the user by selecting one of the following options from the drop-down
list:
Forum moderator: Select this option and click Add
new role in order to assign forum responsibility to the user. Read more here.
Editor: The role of editor gives the user access to add, remove
or edit content to specific areas of the website. Click Add
new role, select the area of the website to which the user will
have access (you can only select one area/item at a time) and click Select. 
Use the arrow button above the list in order
to navigate to a higher level of your website structure. Read
more here.
Repeat step 5 if you wish to assign access to other areas. You can also remove user access by selecting the relevant check boxes and clicking Remove selected roles.
The user has been registered with the specified
access.