public async Task <CoinMarketModel> GetCoins()
 {
     if (_Coins == null)
     {
         _Coins = await _coinMarketService.GetMarket();
     }
     return(_Coins);
 }
        public async Task <IActionResult> CoinMarket()
        {
            var data = await _coinMarketService.GetMarket();

            return(Ok(data));
        }