TypeError [ERR_INVALID_CALLBACK]: Callback must be a function
    at maybeCallback (fs.js:128:9)
    at Object.writeFile (fs.js:1163:14)
    at Client.<anonymous> (/root/ircbot/ircbot.js:22:5)
    at Client.emit (events.js:198:13)
    at Client.<anonymous> (/root/ircbot/node_modules/irc/lib/irc.js:557:22)
    at Client.emit (events.js:198:13)
    at iterator (/root/ircbot/node_modules/irc/lib/irc.js:846:26)
    at Array.forEach (<anonymous>)
    at Socket.handleData (/root/ircbot/node_modules/irc/lib/irc.js:841:15)
    at Socket.emit (events.js:198:13)