public void encryptDetail(Detail detail) {
        List<char[]> reference = Arrays.asList("abcdefghijklmnopqrstuvxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890".toCharArray());
        String username = detail.getUsername();
        String password = detail.getPassword();
        char[] usernameArray = username.toCharArray();
        char[] encryptedUsername = new char[username.length()];
        for(int i = 0; i < username.length(); i++) {
            encryptedUsername  = reference.get(usernameArray[i] + 2);
        }
    }