public Audience updateAudience(String userName, String password, String firstName, String lastName,String email) {
    	 Audience viewer = manager.find(Audience.class, userName);
    	 if (viewer != null) {
    		 viewer.setUserName(userName);
    	 	 viewer.setPassword(password);
    	 	 viewer.setFirstName(firstName);
    	 	 viewer.setLastName(lastName);
    	 	 viewer.setEmail(email);
    	 }
    	 return viewer;
     }