Azure SQL Database - contained users password

Where is the password saved when creating a contained user for the Azure SQL database (PaaS)? For example: CREATE USER taiobtest WITH password='PVHz3U4A$LNytQF^'; GO For server logins I can get it from sys.sql_logins:password_hash column. My use case is refreshing non-production from production backup. I need to script out the database contained users and all relevant permission before the restoration. Once restored clean up production database users/permission and reinstate non-production users and permissions.