Developers have no authority to either check or collect users' information and cancel subscriptions for users directly, users have to cancel subscription in their own accounts.
For subscriptions made through PayPal, please manage your subscription in the PayPal account.
- Log in to your PayPal account at https://www.paypal.com/us/home.
- Click the Settings icon next to "Log out".
- Select Preapproved Payments under "Payment settings".
- Select the merchant whose agreement you want to cancel and click the "Cancel Subscription" button.
- Confirm your request to finalize the cancellation.