static void Main(string[] args)
{
SteamManager steamManager = SteamManager.SetKey("F048AF532EAEC0278D40732105FA0057");
Console.Write("Enter a steam username (not nickname): ");
string user_name = Console.ReadLine();
steamManager.UseSteamUser(user_name);
SteamUser.GetFriendsList(steamManager.GetUserId());
Console.ReadLine();
}