Swift login alert shows up when you logout

For logout we are calling below code,

Auth0.webAuth().clearSession(federated: true) { (isLoggedOut) in
DispatchQueue.main.async {
let keychain = A0SimpleKeychain(service: “Auth0”)
keychain.clearAll()
//Perform UI Updates
self.credentials = nil
_ = self.credentialsManager.clear()
callback(isLoggedOut)
}
}