Paywall events

Use events to update elements in your frontend.

REASON	DESCRIPTION
`openings-trial`	When calling `paywall.open()`, if the type of trial specified in the paywall settings is "number of trial actions" and the user's actions have not exceeded the specified number, the paywall will not open.
`time-trial`	When calling `paywall.open()`, if the type of trial specified in the paywall settings is "trial time" and the user's first time open have not exceeded the specified time in hours, the paywall will not open.
`country-not-match`	The user's country does not match the country specified in the paywall settings.
`visibility-turned-off`	Paywall’s visibility setting is turned off.
`closed-by-user`	The user closed the paywall.
`active-payment-found`	The user's purchase has been restored after the account recovery.
`success-payment`	The user made a purchase.
`tokenization-sign-in`	The user is authenticated, which triggers when tokenization is enabled.
`error`	An error occurred.