String userName = CommandUtil.getStringFromParamKey(m, Commands.AUTHENTICATE.P_USER_NAME);
String passwd = CommandUtil.getStringFromParamKey(m, Commands.AUTHENTICATE.P_USER_PASS);
String mahcineId = CommandUtil.getStringFromParamKey(m, Commands.AUTHENTICATE.P_USER_MACHINE_IDENT);
String version = CommandUtil.getStringFromParamKey(m, Commands.AUTHENTICATE.P_PLUGIN_VERSION);
Authentification a = WOJServer.getInstance().getAuthentificationService().authenticate(userName, passwd, mahcineId, version);
//Current server can not serve the request, we send a redirect to the good server
if(a instanceof AuthNotDone) {
throw new ServerRedirectException(((AuthNotDone)a).getAuthServer());
} else {