Crash when logged-in users update an app with the new SDK version

[timoinutilis]

If a user logged in with an app using the old Cidaas SDK and then update to a version with the new Cidaas SDK, it will crash.

The problem is the function accessTokenModelToAccessTokenEntity:

One line was was changed from:
AccessTokenModel.shared.refresh_token = accessTokenEntity.refresh_token
to:
AccessTokenModel.shared.refresh_token = try! accessTokenEntity.refresh_token.aesEncrypt(key: key, iv: salt)

There is no fallback for old user data without encryption, and there is no error handling either. It just crashes.

The same seems to be true for access_token