Value is delete sometime unexpectedly

[trieuhellodenteam]

Please consider submitting the following information (if relevant):

• Library setup method: file, Carthage, CocoaPods or Swift Package Manager.
• Version of the library. Example: 8.0.
• Xcode version. Example: 8.3.3.
• OS version. Example: iOS 10.3.2.

I used keychain for store identifier device

`
class IOSDeviceManager {

static let shared = IOSDeviceManager()
var identifier: String {
    if let deviceId = keychain.get(deviceIdString) {
        return deviceId
    } else {
        let deviceId = UIDevice.current.identifierForVendor?.uuidString ?? ""
        keychain.set(deviceId, forKey: deviceIdString)
        return deviceId
    }
}

}

`

It worked perfect when I uninstalled then reinstall. But I don't know sometime IOSDeviceManager.shared. identifier get new value.
Do you know any reason?

[evgenyneu]

Hi, thanks for reporting. This could be related to #15. Sometimes the Keychain returns nil, there is a potential workaround in #78.