Discord.js Kick

const Discord = require('discord.js');

const client = new Discord.Client();

const config = require("./config.json");


client.on('ready', () => {
  console.log('I am ready!');
}); //This is sending a message to the terminal to show the bot is online and working.

client.on('message', message => {

  if (!message.guild) return;


  if (message.content.startsWith('?kick')) { //**This is the command, this says if someone says ?kick then pay attention to teh rest to teh bot.**\\

    const user = message.mentions.users.first(); // This says if you mention this user, it is talking about that user

    if (user) {

      const member = message.guild.member(user);

      if (member) {

        member.kick('Optional reason that will display in the audit logs').then(() => {

          message.reply(`Successfully kicked ${user.tag}, you should feel bad! They will never be able to rejoin until they click join again!`);
        }).catch(err => {

          message.reply('I was unable to kick the member. Check if their roles are higher then mine or if they have administrative permissions!');

          console.error(err);
        });
      } else {

        message.reply('That user isn\'t in this guild!');
      }

    } else {
      message.reply('You didn\'t mention the user to kick!'); // Thus is creating a message so that you know if you failed
// The / is to show the script that the (') is not the end of it
    }
  }
});