To use them you will need to have OS credentials:
Open the project in the STACKIT portal in which the server is created.
Choose "Infrastructure API" from the Project detailed menu on the left.
Note down your OpenStack project ID and click on "Create new UAT".
The Token Name is the OS_USERNAME variable.
The Password is the OS_PASSWORD variable.
Please be informed that OS comes from OpenStack
Please copy your credentials to a secure place.