how to use policy.json in kolla

Hello, I'm using OpenStack Kolla Ansible, and I want to define a specific level of access for each user, but I couldn't find any documentation on this matter. For example, I have two users named David and Adrian, and I want the user David to have the ability to delete an instance, while the user Adrian should not have this access. Both users are members of a shared project. The only documentation I found is a sample policy.yaml file, which states that it should be placed in the /etc/nova directory. Could you please clarify where this file should be located for OpenStack Kolla Ansible? https://docs.openstack.org/nova/latest/configuration/sample-policy.html