// The SPIFFE identity of the workload. The identity is joined to form spiffe://<trust_domain>/ns/<namespace>/sa/<service_account>.
  // TrustDomain of the workload. May be elided if this is the mesh wide default (typically cluster.local)
  string trust_domain = 6;
  // ServiceAccount of the workload. May be elided if this is "default"
  string service_account = 7;

  // If present, the waypoint proxy for this workload.

	for _, f := range opts.Authentication.ServiceAccounts.KeyFiles {
		keys, err := keyutil.PublicKeysFromFile(f)
		if err != nil {
			return nil, nil, fmt.Errorf("failed to parse key file %q: %w", f, err)
		}
		pubKeys = append(pubKeys, keys...)
	}
	config.ServiceAccountIssuerURL = opts.Authentication.ServiceAccounts.Issuers[0]
	config.ServiceAccountJWKSURI = opts.Authentication.ServiceAccounts.JWKSURI

	oldServiceAccount := shards.ServiceAccounts
	serviceAccounts := sets.String{}
	for _, epShards := range shards.Shards {
		for _, ep := range epShards {
			if ep.ServiceAccount != "" {
				serviceAccounts.Insert(ep.ServiceAccount)
			}
		}
	}

	if !oldServiceAccount.Equals(serviceAccounts) {
		shards.ServiceAccounts = serviceAccounts

---
# Source: prometheus/templates/serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    app.kubernetes.io/component: server
    app.kubernetes.io/name: prometheus
    app.kubernetes.io/instance: prometheus
    app.kubernetes.io/version: v2.52.0
    helm.sh/chart: prometheus-25.21.0
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/part-of: prometheus
  name: prometheus
  namespace: istio-system

	// waypoint. Must be one of "all", "service", "workload".
	TrafficType string

	// ServiceAccounts from instances of the waypoint.
	// This only handles Pods. If we wish to support non-pod waypoints, we'll
	// want to index ServiceEntry/WorkloadEntry or possibly allow specifying
	// the ServiceAccounts directly on a Gateway resource.
	ServiceAccounts []string
}

			Ports:          ports.All(),
			ServiceAccount: true,
			Subsets: []echo.SubsetConfig{
				{
					Replicas: 1,
					Version:  "v1",
				},
				{
					Replicas: 1,
					Version:  "v2",
				},
			},
		}).
		WithConfig(echo.Config{
			Service:        Uncaptured,
			Namespace:      apps.Namespace,
			Ports:          ports.All(),
			ServiceAccount: true,
			Subsets: []echo.SubsetConfig{

---
# Source: kiali-server/templates/serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kiali
  namespace: istio-system
  labels:
    helm.sh/chart: kiali-server-1.85.0
    app: kiali
    app.kubernetes.io/name: kiali
    app.kubernetes.io/instance: kiali
    version: "v1.85.0"
    app.kubernetes.io/version: "v1.85.0"
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/part-of: "kiali"
...
---

			Name:                  wle.Name,
			Namespace:             wle.Namespace,
			Network:               network,
			ClusterId:             string(a.ClusterID),
			ServiceAccount:        wle.Spec.ServiceAccount,
			Services:              constructServicesFromWorkloadEntry(&wle.Spec, services),
			AuthorizationPolicies: policies,
			Status:                workloadapi.WorkloadStatus_HEALTHY, // TODO: WE can be unhealthy

		policy:         trafficPolicy,
		port:           port,
		clusterMode:    clusterMode,
		direction:      model.TrafficDirectionOutbound,
	}

	if clusterMode == DefaultClusterMode {
		opts.serviceAccounts = serviceAccounts
		opts.istioMtlsSni = model.BuildDNSSrvSubsetKey(model.TrafficDirectionOutbound, "", service.Hostname, port.Port)
		opts.meshExternal = service.MeshExternal
		opts.serviceRegistry = service.Attributes.ServiceRegistry

	CredFetcher CredFetcher

	// credential identity provider
	CredIdentityProvider string

	// Namespace corresponding to workload
	WorkloadNamespace string

	// Name of the Service Account
	ServiceAccount string

	// XDS auth provider
	XdsAuthProvider string

	// Cert signer info
	CertSigner string

	// Delay in reading certificates from file after the change is detected. This is useful in cases