Pushover

1. Create an app at pushover.net.
2. Store the API key in <secret-name> Secret and define the secret name in <config-map-name> ConfigMap:

apiVersion: v1
kind: ConfigMap
metadata:
  name: <config-map-name>
data:
  service.pushover: |
    token: $pushover-token

apiVersion: v1
kind: Secret
metadata:
  name: <secret-name>
stringData:
  pushover-token: avtc41pn13asmra6zaiyf7dh6cgx97

1. Add your user key to your Application resource:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  annotations:
    notifications.argoproj.io/subscribe.on-sync-succeeded.pushover: uumy8u4owy7bgkapp6mc5mvhfsvpcd