.

kiki@vps372137:~/src$ node app.js
/home/kiki/src/library/Bot.js:74
    loginWithToken(token, callback = () => {}) {
                                   ^

SyntaxError: Unexpected token =
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:374:25)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/home/kiki/src/app.js:3:31)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)