var SteamApi = require('steam-api');
var optionalSteamId = steam_64;
var user = new SteamApi.User(steam_api_key, optionalSteamId);
user.GetPlayerBans(optionalSteamId).done(function(result){
console.log(result);
});
Result:
/node_modules/q/q.js:155
throw e