Token Manager
class TokenManager(appCache: PersistentKVStore = SharedPrefsWrapper(
KakaoSdk.applicationContextInfo.sharedPreferences
), encryptor: Cipher = AESCipher()) : TokenManageable
토큰 저장소, 기기 고유값으로 암호화된 토큰을 SharedPreferences에 저장
Token manager that encrypts tokens with the device's unique value and saves in the SharedPreferences