'signatureVerificationFailed' while implementing one-click Auth in iOS App

[MuhammadWahab0896]

Describe the bug
i want to implement one-Click Auth in my iOS app, i am following this documentation
https://docs.walletconnect.com/walletkit/ios/one-click-auth
i have also checked the example app and followed that too, in all the cases i found 'signatureVerificationFailed' as a response
this is the code i'm using

let walletAccount = Account(
chainIdentifier: "eip155:1",
address: "0x724d0D2DaD3fbB0C168f947B87Fa5DBe36F1A8bf"
)!
let prvKey = Data(hex: "462c1dad6832d7d96ccf87bd6a686a4110e114aaaebd5512e552c0e3a87b480f")
public func acceptOneAuthRequestNew() {
guard let request = oneAuthRequest else {
return
}
let requestedChains = Set(request.payload.chains.compactMap { Blockchain($0) })
let supportedChainsArray = [Blockchain("eip155:1")!,
Blockchain("eip155:11155111")!,
Blockchain("eip155:137")!,
Blockchain("eip155:80001")!,
Blockchain("eip155:43114")!,
Blockchain("eip155:43113")!,
Blockchain("eip155:56")!]

let supportedChains = Set(supportedChainsArray)
let commonChains = requestedChains.intersection(supportedChains)
let supportedMethods = ["personal_sign", "eth_sendTransaction"]

Task(priority: .high) {
    var authObjects = [AuthObject]()
    for chain in commonChains {
        let accountForChain = Account(blockchain: chain, address: walletAccount.address)!
        let supportedAuthPayload = try Web3Wallet.instance.buildAuthPayload(
            payload: request.payload,
            supportedEVMChains: Array(commonChains),
            supportedMethods: supportedMethods
        )
        let formattedMessage = try Web3Wallet.instance.formatAuthMessage(
            payload: supportedAuthPayload,
            account: walletAccount
        )

        let signerFactory = DefaultSignerFactory()
        let signer = MessageSignerFactory(signerFactory: signerFactory).create()

        let signature = try signer.sign(
            message: formattedMessage,
            privateKey: prvKey,
            type: .eip191
        )

        let authObject = try Web3Wallet.instance.buildSignedAuthObject(
            authPayload: supportedAuthPayload,
            signature: signature,
            account: walletAccount
        )
        authObjects.append(authObject)
    }
    do {
        let sessions = try await Web3Wallet.instance.approveSessionAuthenticate(
            requestId: request.id,
            auths: authObjects
        )
        print("sessions:", sessions)
    } catch {
        print("oneAuth:failed: \(error)")
    }
}

}