How can we remove a subscriber from our Pushwoosh database?
Basically, we do have /unregisterDevice API method which you can use knowing user's HWID. It could be called manually or directly from SDK. However, in a case when you unregister device manually, if the app is still installed on the device, the user will be reregistered for push notifications on next app open.
Also, GDPR Compliance feature allows a user to delete his data directly from his devices. This feature is available on Enterprise level accounts or as the add-on. If you are interested in GDPR Compliance feature, please contact us via firstname.lastname@example.org or via Contact Us form.