public static ArrayList<User> listOfCreatedUsers() throws IOException {
        ArrayList<User> listOfUsers = new ArrayList<>();

        FileReader fr = new FileReader("src/userData.txt");
        BufferedReader bfr = new BufferedReader(fr);
        String line;

        int totalLine = Destination.linesInFile("src/userData.txt"); //Bruger linesInFile metoden fra Destination class

        for (int i = 0; i < totalLine; i++) {
            line = bfr.readLine();
            String[] strings = line.split("\\t", 6);
            User temp = new User();

            temp.setFirstName(strings[0]);
            temp.setLastName(strings[1]);
            temp.setGender(strings[2]);
            temp.setAge(strings[3]);
            temp.setUsernameID(strings[4]);
            temp.setPassword(strings[5]);

            listOfUsers.add(temp);
        }
        try {
            bfr.close();
            fr.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return listOfUsers;
    }