Prometheus-operator not supported other slack compatibility config (Mattermost)

slack_configs:
  - channel: '#alerts-staging'
    send_resolved: true
    title: '[{{ .Status | toUpper }}{{ if eq .Status "firing" }}:{{ .Alerts.Firing | len }}{{ end }}] Monitoring Event Notification'
    api_url: https://mymat.mycompany.us/api/chat.postMessage
    #app_url: https://mymat.mycompany.us/api/chat.postMessage
    http_config:
      authorization:
          credentials: "mypasswd"
    update_message: true

ts=2026-09-10T08:25:44.240270083Z level=info caller=/workspace/pkg/alertmanager/operator.go:617 msg="sync alertmanager" component=alertmanager-controller key=monitoring/kube-prometheus-stack-alertmanager
ts=2026-09-10T08:25:44.248611639Z level=error caller=/workspace/pkg/operator/resource_reconciler.go:691 msg="Unhandled Error" logger=UnhandledError err="sync \"monitoring/kube-prometheus-stack-alertmanager\" failed: provision alertmanager configuration: failed to initialize from secret: update_message can only be used with bot tokens. api_url must be set to https://slack.com/api/chat.postMessage"
ts=2026-09-10T08:27:06.171022755Z level=info caller=/workspace/pkg/alertmanager/operator.go:617 msg="sync alertmanager" component=alertmanager-controller key=monitoring/kube-prometheus-stack-alertmanager

Name:                   kube-prometheus-stack-operator
Namespace:              monitoring
CreationTimestamp:      Fri, 27 Dec 2024 16:06:47 +0500
Labels:                 app=kube-prometheus-stack-operator
                        app.kubernetes.io/component=prometheus-operator
                        app.kubernetes.io/instance=kube-prometheus-stack
                        app.kubernetes.io/managed-by=Helm
                        app.kubernetes.io/name=kube-prometheus-stack-prometheus-operator
                        app.kubernetes.io/part-of=kube-prometheus-stack
                        app.kubernetes.io/version=88.4.0
                        chart=kube-prometheus-stack-88.4.0
                        helm.toolkit.fluxcd.io/name=kube-prometheus-stack
                        helm.toolkit.fluxcd.io/namespace=flux-system
                        heritage=Helm
                        release=kube-prometheus-stack
Annotations:            deployment.kubernetes.io/revision: 6
                        meta.helm.sh/release-name: kube-prometheus-stack
                        meta.helm.sh/release-namespace: monitoring
Selector:               app=kube-prometheus-stack-operator,release=kube-prometheus-stack
Replicas:               1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:           app=kube-prometheus-stack-operator
                    app.kubernetes.io/component=prometheus-operator
                    app.kubernetes.io/instance=kube-prometheus-stack
                    app.kubernetes.io/managed-by=Helm
                    app.kubernetes.io/name=kube-prometheus-stack-prometheus-operator
                    app.kubernetes.io/part-of=kube-prometheus-stack
                    app.kubernetes.io/version=88.4.0
                    chart=kube-prometheus-stack-88.4.0
                    heritage=Helm
                    release=kube-prometheus-stack
  Service Account:  kube-prometheus-stack-operator
  Containers:
   kube-prometheus-stack:
    Image:      quay.io/prometheus-operator/prometheus-operator:v0.93.1
    Port:       10250/TCP (https)
    Host Port:  0/TCP (https)
    Args:
      --kubelet-service=kube-system/kube-prometheus-stack-kubelet
      --kubelet-endpoints=true
      --kubelet-endpointslice=false
      --localhost=127.0.0.1
      --prometheus-config-reloader=quay.io/prometheus-operator/prometheus-config-reloader:v0.93.1
      --config-reloader-cpu-request=0
      --config-reloader-cpu-limit=0
      --config-reloader-memory-request=0
      --config-reloader-memory-limit=0
      --thanos-default-base-image=quay.io/thanos/thanos:v0.42.4
      --secret-field-selector=type!=kubernetes.io/dockercfg,type!=kubernetes.io/service-account-token,type!=helm.sh/release.v1
      --web.enable-tls=true
      --web.cert-file=/cert/cert
      --web.key-file=/cert/key
      --web.listen-address=:10250
      --web.tls-min-version=VersionTLS13
    Liveness:   http-get https://:https/healthz delay=0s timeout=1s period=10s #success=1 #failure=3
    Readiness:  http-get https://:https/healthz delay=0s timeout=1s period=10s #success=1 #failure=3
    Environment:
      GOGC:  30
    Mounts:
      /cert from tls-secret (ro)
  Volumes:
   tls-secret:
    Type:          Secret (a volume populated by a Secret)
    SecretName:    kube-prometheus-stack-admission
    Optional:      false
  Node-Selectors:  <none>
  Tolerations:     <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Progressing    True    NewReplicaSetAvailable
  Available      True    MinimumReplicasAvailable
OldReplicaSets:  kube-prometheus-stack-operator-7f6dcf9fbd (0/0 replicas created), kube-prometheus-stack-operator-845487474d (0/0 replicas created), kube-prometheus-stack-operator-7d6797d48d (0/0 replicas created), kube-prometheus-stack-operator-856dc8cbf5 (0/0 replicas created), kube-prometheus-stack-operator-d6497b5b8 (0/0 replicas created)
NewReplicaSet:   kube-prometheus-stack-operator-65774d6464 (1/1 replicas created)
Events:          <none>

clientVersion:
  buildDate: "2026-03-18T19:18:44Z"
  compiler: gc
  gitCommit: 8b2bf66ce7018f6e13e8767624d4ce7768a8a2e5
  gitTreeState: clean
  gitVersion: v1.34.6
  goVersion: go1.24.13
  major: "1"
  minor: "34"
  platform: linux/amd64
kustomizeVersion: v5.7.1
serverVersion:
  buildDate: "2025-11-11T19:00:39Z"
  compiler: gc
  emulationMajor: "1"
  emulationMinor: "34"
  gitCommit: 8cc511e399b929453cd98ae65b419c3cc227ec79
  gitTreeState: clean
  gitVersion: v1.34.2
  goVersion: go1.24.9
  major: "1"
  minCompatibilityMajor: "1"
  minCompatibilityMinor: "33"
  minor: "34"
  platform: linux/amd64

ts=2026-09-10T08:25:44.240270083Z level=info caller=/workspace/pkg/alertmanager/operator.go:617 msg="sync alertmanager" component=alertmanager-controller key=monitoring/kube-prometheus-stack-alertmanager
ts=2026-09-10T08:25:44.248611639Z level=error caller=/workspace/pkg/operator/resource_reconciler.go:691 msg="Unhandled Error" logger=UnhandledError err="sync \"monitoring/kube-prometheus-stack-alertmanager\" failed: provision alertmanager configuration: failed to initialize from secret: update_message can only be used with bot tokens. api_url must be set to https://slack.com/api/chat.postMessage"
ts=2026-09-10T08:27:06.171022755Z level=info caller=/workspace/pkg/alertmanager/operator.go:617 msg="sync alertmanager" component=alertmanager-controller key=monitoring/kube-prometheus-stack-alertmanager