Hello
We actually have this app, pre-configured in our catalog. Once you receive your Admin account, you can then browse to Apps>>Add Web Apps and search for RedMine to begin.
Here are the step by step instructions to help you out. Please let us know if you run into any issues.
https://docs.centrify.com/en/centrify/appref/cloudhelp/o-z/saas_appref_redmine.html#
I also recommend running through the tutorial to get a feel for the Admin portal and to help identify some next steps.
Have a great day!
Ryan V.