// replaces the in-memory cache object.
func (store *IAMStoreSys) LoadIAMCache(ctx context.Context, firstTime bool) error {
	bootstrapTraceMsgFirstTime := func(s string) {
		if firstTime {
			bootstrapTraceMsg(s)
		}
	}
	bootstrapTraceMsgFirstTime("loading IAM data")

	newCache := newIamCache()

	loadedAt := time.Now()

	if iamOS, ok := store.IAMStorageAPI.(*IAMObjectStore); ok {