There is a column named "PASSWORD" to save user's password inside User ItemType. But if opening the XML file exported by Aras Package Utility, you will find that password data does not exist. Therefore, password data will not be contained if import this kind of package. Use SSMS to execute a query command will find NULL value for PASSWORD column. Maybe this is due to security issue.
Programming notes from a non-expert guy who keeps learning in various applications.