BTW, ```username``` behind initialized with ```request.getHeader("sec-username")``` in https://github.com/georchestra/georchestra/blob/master/downloadform/src/main/java/org/georchestra/dlform/AbstractApplication.java#L49, I'm not sure that setString will not fail here: https://github.com/georchestra/georchestra/blob/master/downloadform/src/main/java/org/georchestra/dlform/AbstractApplication.java#L73