Based on the doc: https://docs.google.com/document/d/1d5alzMVxU6vfZaxcvVrJGr-G3_z4rHbCPkskfGtj1lw/edit?tab=t.0#heading=h.ll06elsrif5g

Category: Regional context (2).

Create integration tests for checking if the User can see only Regions/Projects that he is allowed to see. As far as I know, we should be able to create resources (users) and assign them projects/Region access via OpenStackSDK
But we need to try when we have access to the environment. If there will be some issues, we will discuss it with Security DFG.