How to set email notification from OpenSearch CR OpenSearchISMPolicy

Plugins Index Management
1

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):

2.18.0

Describe the issue:
I use opensearch Operator deploy my openserach-cluster.
the opensearch Operator also brings a CRD “OpenSearchISMPolicy”, which helps to use a yaml to deinfe ISM.

In the Opensearch UI, if I manually setup an ISM policy, then I can choose a configured notification channel (email), and write an email template.

hoewver, in CR OpenSearchISMPolicy, I see the notifcation doesn’t has email option.

$ kc explain OpenSearchISMPolicy.spec.errorNotification.destination
GROUP:      opensearch.opster.io
KIND:       OpenSearchISMPolicy
VERSION:    v1

FIELD: destination <Object>


DESCRIPTION:
    The destination URL.
    
FIELDS:
  amazon        <Object>
    <no description>

  chime <Object>
    <no description>

  customWebhook <Object>
    <no description>

  slack <Object>
    <no description>

Ideally, I’d like to set the OpenSearchISMPolicy like this:

apiVersion: opensearch.opster.io/v1
kind: OpenSearchISMPolicy
metadata:
  name: logs-rollover-retention
spec:
  opensearchCluster:
    name: app-logging-opensearch
  description: "set index rollover then wait and retension"
  policyId: logs-rollover-retention
  defaultState: young_indexes
  ismTemplate:
    indexPatterns:
       - logs-*
    priority:  1
  errorNotification:
    channel: my-email-channel # this email channel already configured and tested
    # destination: 
    #   here i don't know what to fill, may I refer an email receiver group name here?
    messageTemplate:
      source: "APP logging OpenSearch ISM job: The index {{ctx.index}} failed during ISM policy execution"
  states:
    - name: young_indexes
      actions:
        - rollover:
            minIndexAge: 1d
            minPrimaryShardSize: 5g
            minSize: 30g
      transitions:
        - stateName: retention
          conditions:
            minIndexAge: "15d"
    - name: retention
      actions:
        - delete: {}