public static void addNewUser(String id, String name) throws Exception { if (id == null || name == null) return; id = id.trim(); name = name.trim(); if (id.isEmpty() || name.isEmpty() || id.contains(" ")) { printError( "Incorect ID or Name. User ID and name cannot be empty and ID cannot contain whitespace."); return; } boolean added = false; added = control.addUser(id, name); if (added) System.out.println("created user " + id + " with name " + name); else { User temp = control.login(id); System.out.println("user " + id + " already exists with name " + temp.getFullName()); control.logout(); } }