// purgeExpiredCredentialsForExternalSSO - validates if local credentials are still valid
// by checking remote IDP if the relevant users are still active and present.
func (sys *IAMSys) purgeExpiredCredentialsForExternalSSO(ctx context.Context) {
	parentUsersMap := sys.store.GetAllParentUsers()
	var expiredUsers []string
	for parentUser, puInfo := range parentUsersMap {
		// There are multiple role ARNs for parent user only when there