If you have created the users in lower environment and need to move those to higher environment , you can do it using acs commons then go through the below steps :
1. Go to miscadmin.
2. Under Tools > acs-commons > Content Packagers, create a page.
3. After creating the page , double click and open the page.
4. Click on edit, on the pop up you need to do some configurations as below and click OK.
5. Click on Create Package after verifying the details on preview.
6. Go to the package manager to see the package created with your users.