Hello there, I need to remove the specific Users Permission a user have in a DataCenter. I manage to do it in this way: username = "..." dc = "..." system_service = connection.system_service() users_service = system_service.users_service() data_centers_service = system_service.data_centers_service() # Getting the User object for user in users_service.list(): if username in user.user_name: break # Getting the DataCenter object for data_center in data_centers_service.list(): if dc in data_center.name: break # Getting DataCenter service and its Permission Service data_center_service = data_centers_service.data_center_service(id= data_center.id) data_center_permissions_service = data_center_service.permissions_service() # Getting the Permission for the User in the DataCenter for data_center_permission in data_center_permissions_service.list(): data_center_permission_user = data_center_permission.user if data_center_permission_user: if data_center_permission_user.id == user.id: data_center_permission_user.remove() As you can see I can do it, but, I am using the permissions of the DataCenter and this list could be very long. In the old ovirtsdk (version 3) this was done by the following: u = kvm.users.get(id=userid) for perm in u.permissions.list(): udc = perm.get_data_center() if udc: globaldc = kvm.datacenters.get(id=udc.get_id()) if globaldc.get_name() == dc: perm.delete() that last piece of code iterate by the user permission list and delete the specific Data Center permission. I have been trying this doing the following: user_service = users_service.user_service(id=user.id) user_permissions_service = user_service.permissions_service() list = user_permissions_service.list() Is that last variable, list: the permissions list for the specified user, I ask that because if I print the size of the list for an specific user, the number I get is not correct... Thanks for all in advance to all Manuel