[Horizon][policies][keystone] allow _member_ role to add user

Hi all, I am using kolla-ansible for OpenStack deployment in the yoga version. Would it be possible to allow a user with a "_member_" role to add a user to the respective project? In OpenStack, an admin role allows users to add, delete, and edit a user profile. I would like to have the same privilege added to the "_member_" role. I have tried to modify the file "user.py" in the keystone container at "keystone/common/policies" and restarted the container. However, the button on my horizon dashboard did not appear. How could I integrate the code in order to allow the create button to appear on my dashboard with the "_member_" role? Is there a way to do that? THanks for your help James