Comando de exec da kanarinha

exec.js

const { Command } = require('discord.js-commando');

class ExecCommand extends Command {
  constructor (client) {
    super (client, {
      name: "exec",
      aliases: ["bash"],
      group: "commands",
      memberName: "exec",
      description: "Run something on terminal",
      guildOnly: false,
      args: [{
        key: 'text',
        label: 'text',
        prompt: "NO COMMAND! Enter the command to run",
        type: "string"
      }]
    });
  }
  async run (msg, { text }) {
    if (msg.author.id != "201710904612618240") return;
    const { spawn } = require('child_process');
    var a = [];
    var o = await msg.channel.send("Just a sec...");
    var cmdarr = text.split(" ");
    var fcmd = cmdarr.shift();
    const ls = spawn(fcmd, cmdarr);
    ls.stdout.on('data', (data) => {
      if (a.length > 15) a = [];
      a.push(data);
      setTimeout(() => { o.edit("```"+ a.join('\n') +"```") }, 500);
    });
  
    ls.stderr.on('data', (data) => {
      if (a.length > 15) a =[];
      a.push(data);
      setTimeout(() => { o.edit("```"+ a.join('\n') +"```"); }, 500)
     });
  
     ls.on('close', (code) => {
      if (a.length > 15) a =[];
      a.push("OK; Finished with code "+ code);
      setTimeout(() => { o.edit("```"+ a.join('\n') +"```"); }, 500)
     });
  }
}
module.exports = ExecCommand;