public void makeCreator(Long userId) {
   VDCUser user = em.find(VDCUser.class, userId);
   VDCNetwork vdcNetwork = vdcNetworkService.find();
   // If the user already has a networkRole, then he is already a creator or networkAdmin,
   // so don't need to change the role.
   if (user.getNetworkRole() == null) {
     user.setNetworkRole(networkRoleService.getCreatorRole());
     mailService.sendCreatorAccountNotification(vdcNetwork.getContactEmail(), user.getUserName());
   }
 }