ClientToken Challenge not solved #417

Hello, it's not really a bug because it seems to work in this implementation but I'm trying to transcribe librespot in C# and I encounter a problem. During the initial request to retrieve the client token, a challenge is asked which doesn't seem to happen in librespot-java.

oneof parameters {
        ClientSecretParameters client_secret_parameters = 2;
        EvaluateJSParameters evaluate_js_parameters = 3;
        HashCashParameters evaluate_hashcash_parameters = 4;
    }

Librespot doesn't seem to solve these challenges in the ApiClient class, if anyone could enlighten me on this point.

Also, during the HashCash challenge in this request there is no LoginContext and the length is not the same (20) so the resolution algorithm must be somewhat different.