public Stack<String> getContacts() {
    	try {
			connection.connect();
			connection.executeQuery(USER_CONTACTS + connectedUser.getID());
			Stack<String> contacts = new Stack<String>();
			if (connection.getString("USERNAME") != null) {
				while (connection.next()) {
					contacts.push((String) connection.getString("USERNAME"));
				}
			}
			connection.close();
			return contacts;
		} catch (Exception e) {
			System.out.println("Ocurrio un error al tratar de conectarse.");
		}
    	return null;
    }