type iamStorageWatcher interface {
	watch(ctx context.Context, keyPath string) <-chan iamWatchEvent
}

// Set default canned policies only if not already overridden by users.
func setDefaultCannedPolicies(policies map[string]PolicyDoc) {
	for _, v := range policy.DefaultPolicies {
		if _, ok := policies[v.Name]; !ok {
			policies[v.Name] = defaultPolicyDoc(v.Definition)
		}
	}
}

		if err := iamOS.loadPolicyDoc(ctx, policyName, cache.iamPolicyDocsMap); err != nil && !errors.Is(err, errNoSuchPolicy) {
			return fmt.Errorf("unable to load the policy doc `%s`: %w", policyName, err)
		}
	}
	setDefaultCannedPolicies(cache.iamPolicyDocsMap)

	if iamOS.usersSysType == MinIOUsersSysType {
		bootstrapTraceMsg("loading regular IAM users")
		regUsersList := listedConfigItems[usersListKey]
		for _, item := range regUsersList {