Sorry for misunderstanding your question. 

The problem with creating a new user (and not a new person) is in the tutorial. There is no "create user" in the sidebar as shown in the tutorial. But you can do the following steps:

• log in as zope again (pckalbxs) 
• Go to "Modules" - "Persons" and choose the person that you want to create the login for.
• choose "+Add" - "ERP5 Login" - "Create Document".  
• Add the User Login and the password.
• Now switch to the "Assignment" view and click on the newly created login (which is still in Draft state). 
• Click on "Actions" and select "Validate" - and "Validate" one more time. 
• You can now log off from zope and the new ERP5 login that you created.
• After the test, log in with jingjing.xu again to continue with the tutorials.