subscription.past_dueSent once, when a subscription first falls behind on payment.
A past-due subscription has not ended. The subscriber keeps access until current_period_end, and the
gateway keeps retrying in the meantime. This is the window in which telling the player is useful,
which is why this event fires on the state change rather than on every retry. If the retries succeed
you receive subscription.renewed; if they are exhausted you receive
subscription.ended.
For the individual retries, and for audit logging, use
subscription.payment_failed.
data
subscription_idstring· uuidThe subscription ID.
player_usernamestringPlayer in-game name.
player_uuidstring· uuidMinecraft UUID, if known.
package_idstring· uuidPackage ID of the subscription.
package_namestringPackage name.
renewal_countintegerSuccessful renewals so far.
current_period_endstring· date-timeWhen access runs out if the payment is never recovered.
payment_providerstringstripe, paypal, iyzico or terminal3.FluxStore sends this payload as an HTTP POST to your configured webhook URL.