I am working on Issuer Extension using which user can add debit/ credit card through wallet directly. This is Extension based (Non and UI Extension. I am nearly implemented this however have doubts about PKIssuerProvisioningExtensionHandler methods which are below open func status(completion: @escaping (PKIssuerProvisioningExtensionStatus) -> Void)  open func passEntries(completion: @escaping ([PKIssuerProvisioningExtensionPassEntry]) -> Void) open func generateAddPaymentPassRequestForPassEntryWithIdentifier(_ identifier: String, configuration: PKAddPaymentPassRequestConfiguration, certificateChain certificates: [Data], nonce: Data, nonceSignature: Data, completionHandler completion: @escaping (PKAddPaymentPassRequest?) -> Void) My query is what is the significance of configuration in last callback. Can anyone please help with this. Thanks in advance