Adding custom user to repsets psmdb

I am trying to add a custom user to mongoDB database. I am not using sharding only using repsets. Can this be done ? Below is a snippet from my values file. So far I have no luck. Thanks for any insight. ( my spacing is ok, I cant get it to paste correctly)

replsets:
rs0:
name: rs0
size: 3
users:
- name: my-user
db: admin
passwordSecretRef:
# name: my-user-password
# key: password
roles:
- name: clusterAdmin
db: admin
- name: userAdminAnyDatabase
db: admin