Keycloak-db-secret dynamic pic credentials from external postgres operators secret

I am currently using the Postgresql Operator from PGO, the Postgres Operator from Crunchy Data
for every user, it is creating its own user-related secret eg.: demo-pguser-keycloakuser and it is generating a dynamic password. Now I am trying to connect Postgres with my keycloak operator, but keycloak does not understand the keys other than this
POSTGRES_DATABASE: “”
POSTGRES_EXTERNAL_ADDRESS: “”
POSTGRES_EXTERNAL_PORT: “”
POSTGRES_HOST: “”
POSTGRES_PASSWORD: “”
POSTGRES_USERNAME: “”.
And Postgres secret contains
apiVersion: v1
data:
dbname: base64value
host: base64value
password: base64value
pgbouncer-host: base64value
pgbouncer-port: base64value
pgbouncer-uri: base64value
port: base64value
This secret contains the password and the username, so it would be good to be able to put in the CR of the Keycloak the reference and the key of the secret to be used rather than a hardcoded secret name "Keycloak-db-secret

Thank you in advance