// populate the autocomplete with users if database exists or files have been downloaded
  private void populateAutoComplete() {
    UserList userList1 = UserDB.getAllUsers();
    String[] usernameStrings = new String[userList1.size()];
    usersIDs = new int[userList1.size()];
    int count = 0;
    for (User temp : userList1) {
      usernameStrings[count] = temp.EmployeeNumber + " - " + temp.Surname;
      UserStringList.add(usernameStrings[count]);
      usersIDs[count] = temp.EmployeeID;
      count++;
    }
    ArrayAdapter adapter =
        new ArrayAdapter(this, android.R.layout.simple_list_item_1, usernameStrings);
    UsernameAutoCompleteTextView.setAdapter(adapter);
    UsernameAutoCompleteTextView.setThreshold(1);

    UsernameAutoCompleteTextView.setEnabled(true);
    PasswordInput.setEnabled(true);
    startRound.setEnabled(true);
  }