* @return <code>true</code> if the user was authenticated
*/
public final boolean authenticate(String code, String password) {
String loginConcept = app.getModelConfig().getLoginConcept();
Members members = (Members) app.getEntry(loginConcept);
Member member = (Member) members.retrieveByCode(code);
boolean isValidMember = false;
if (member != null) {
String memberPassword = member.getPassword();
if (memberPassword != null && memberPassword.equals(password)) {
isValidMember = true;