I want to create MonitoringNotificationChannel in GCP to send alerts on opsgenie so we are using web-hook provided by opsgenie channel

apiVersion: monitoring.cnrm.cloud.google.com/v1beta1
kind: MonitoringNotificationChannel
metadata:
  name: monitoringnotificationchannel-webhook_tokenauth
spec:
  type: webhook_tokenauth
    # The spec.labels field below is for configuring the desired behaviour of the notification channel
    # It does not apply labels to the resource in the cluster
  labels:
  description: Sends notifications to indicated webhook URL using HTTP-standard basic authentication. Should be used in conjunction with SSL/TLS to reduce the risk of attackers snooping the credentials.
  sensitiveLabels:
    authToken:
      valueFrom:
        secretKeyRef:
          key: url
          name: quota
  enabled: true         

After applying this we are getting labels as Null

we want to reference Opsgenie URL from sensitiveLabels

Format of opsgenie URL=https://api.opsgenie.com/v1/json/googlestackdriver?apiKey=xxxxxxxxxxx

Docs https://cloud.google.com/config-connector/docs/reference/resource-docs/monitoring/monitoringnotificationchannel