How can i add a sort of attribute or label to user?

Hello, everyone.
I’m trying to develop an operator to manage users manually defined (by kubernetes CR’s) in Grafana. I need to be able to differentiate between users created by the operator and users created by LDAP. so i need to know that, can i add a label or some sort of custom attribute to user when calling the add user api to specify that this user added manually by administrator (operator)? For example can i use authLabel to do this? i would be appreciated if you could help me or suggest an alternative way.