Credentials

auto c = Credentials("iamastring", "soami");
assert(is(typeof(c) == Credentials));
assert(is(typeof(c.youtubeAPIKey) == string));
assert(is(typeof(c.youtubeChannelID) == string));
assert(c.youtubeAPIKey == "iamastring");
assert(c.youtubeChannelID == "soami");