public EclairLightningClient(Uri address, string password, Network network, HttpClient httpClient = null)
 {
     if (address == null)
     {
         throw new ArgumentNullException(nameof(address));
     }
     if (network == null)
     {
         throw new ArgumentNullException(nameof(network));
     }
     _address      = address;
     _password     = password;
     _network      = network;
     _eclairClient = new EclairClient(address, password, network, httpClient);
 }