public IActionResult Index(string creditCards)
{
Dictionary <string, bool> CcDictionary = new Dictionary <string, bool>();
IEnumerable <string> numbers = creditCards.Trim().Split('\n').ToList().Distinct();
foreach (string cc in numbers)
{
CcDictionary.Add(cc.Trim(), _checker.CheckCC(cc.Trim()));
}
return(View(CcDictionary));
}