Creating a Subscription

HashMap<String, Object> subscriptionData = new HashMap<>();
subscriptionData.put("customer_id", 29);  // Customer ID
subscriptionData.put("plan_id", 101);  // Subscription plan ID
subscriptionData.put("line_items", Arrays.asList(
    new HashMap<String, Object>() {{
        put("item_name", "Monthly SaaS License");
        put("item_price", 99.00);
        put("quantity", 1);
    }}
));

int subscriptionId = co.create(ChargeOver.Target.SUBSCRIPTION, subscriptionData);
if (subscriptionId < 0) {
    System.out.println(co.getLastError());
} else {
    System.out.println("Created Subscription ID: " + subscriptionId);
}