Manage Users
To manage users, open the app menu and click on Authentication:

You will see this menu only if you log in as an app administrator (username admin per default).
Predefined Users
The ACCOUNTS tab of users shows 2 predefined users:

User admin is the app administrator and has full rights. The user operator does not have the App Configuration menu. 
Predefined Menus
The MENUS tab shows 2 predefined menus:

The difference between them is the App Configuration menu which is part of the admin menu only.
Leave the menus as is. Changes will be overwritten anyway when the app is updated.
Create a User
In the ACCOUNTS tab, click on NEW ITEM:

The Read-Only box does not affect this app.
You can create 2 types of users:
- Full admins: Menu - admin
- Operators: Menu - operator
Change Users
You can edit the table in-place to change the password, menu, and read-only flag (no effect).
Delete Users
Use the delete button at the right side of a user row:

