public Task <TMarketItemInstances> DOTAInstances(ETMarketCurrency currency)
 {
     return(RequestAsync <TMarketItemInstances>(new RestRequest(DOTA_HOST + $"/prices/class_instance/{currency}.json")));
 }
 public Task <TMarketPrices> DOTAPrices(ETMarketCurrency currency)
 {
     return(RequestAsync <TMarketPrices>(new RestRequest(DOTA_HOST + $"/prices/{currency}.json")));
 }