• Nice and Easy Script. 
    But,
    The sp_change_users_login is deprecated procedure. sp_change_users_login cannot be used with SQL Database.
    Below is article to Troubleshoot Orphaned Users (SQL Server)
    https://docs.microsoft.com/en-us/sql/sql-server/failover-clusters/troubleshoot-orphaned-users-sql-server

    ThanksSaurabh.D