This is only the relevant method for opening the account selector

AccountSelector.java

    public void accountSelectorGUI(Player p) {

        Inventory gui = utility.createGUI(p, "Your Bank Accounts", 9);

        int checkingSlot = 1;
        for(String accUUID : accountStorage.getAccountList("player", p.getDisplayName(), "checkingAccounts")) {
            utility.addItem(gui, checkingSlot, Material.EMERALD, "Checking Account", "§7Balance: §f" + accountStorage.getAccountBalance(accUUID) + ";§7Creation Date: §f" + accountStorage.getAccountDOC(accUUID) + "; ;" + accUUID);
            checkingSlot++;
        }

        int savingsSlot = 5;
        for(String accUUID : accountStorage.getAccountList("player", p.getDisplayName(), "savingsAccounts")) {
            utility.addItem(gui, savingsSlot, Material.EMERALD_BLOCK, "Savings Account", "§7Balance: §f" + accountStorage.getAccountBalance(accUUID) + ";§7Creation Date: §f" + accountStorage.getAccountDOC(accUUID) + "; ;" + accUUID);
            savingsSlot++;
        }

        p.openInventory(gui);
    }