node-apn receive InvalidProviderToken (403) response error from APNs. What need I change in configuration to send push message?
Apple says: APNs supports only provider authentication tokens that are signed with the ES256 algorithm. Unsecured JWTs, or JWTs signed with other algorithms, are rejected, and your provider server receives the InvalidProviderToken (403) response.
Used this tutorial: https://eladnava.com/send-push-notifications-to-ios-devices-using-xcode-8-and-swift-3/