if parentUser == "" {
		return errInvalidArgument
	}

	cache := store.lock()
	defer store.unlock()

	secret, err := getTokenSigningKey()
	if err != nil {
		return err
	}

	var revoked bool
	for _, ui := range cache.iamSTSAccountsMap {
		if ui.Credentials.ParentUser != parentUser {
			continue
		}

				if err != nil {
					jwtClaims, err = auth.ExtractClaims(cred.SessionToken, globalActiveCred.SecretKey)
				}
			} else {
				var secretKey string
				secretKey, err = getTokenSigningKey()
				if err != nil {
					continue
				}
				jwtClaims, err = auth.ExtractClaims(cred.SessionToken, secretKey)
			}
			if err != nil {
				// skip this cred - session token seems invalid