This window is basically for administrator for adding name of New User and to give them desired authority. In a hotel you require more user in comparison of single user. So, by keeping this thing in mind you have also given method for addition of New User. By tracking this path you can successfully add name of your user. Simply click on Tool option and then go on User Account and ultimately select Add User option. You can also choose this following.
Tools>User Account>>Add User.
A small box will come on your Dashboard in which you need to fill only two things; one is New User ID Name and last one is Set Password. After that just click on OK button. You can also observe all these written process in a graphic way which is being given below.