Added whois command

commands/whois.js

+const Discord = require('discord.js');
+const moment = require('moment')
+
+exports.run = (client, message , args) => {
+  let user = message.guild.member(message.mentions.users.first() || message.author || message.guild.members.cache.get(args[0]));
+  client.users.cache.get(user);
+    const embed = new Discord.MessageEmbed()
+    .setColor(0x00AE86)
+    .setTitle("User İnformation")
+    .setTimestamp()
+    .addField('User:',`<@${user.id}>`)
+    .addField('User ID:', `${user.id}`)
+    .addField('Created At:', `${moment(user.user.createdAt).format('lll') + '\n' + moment(new Date()).diff(user.user.createdAt, 'days') + ' days ago'}`)
+    .addField('Joined At:', `${moment(user.joinedAt).format('lll') + '\n' + moment(new Date()).diff(user.joinedAt, 'days') + ' days ago'}`)
+    .addField('Last Message:', `${user.lastMessage}`)
+  return message.channel.send(embed);
+};
+
+  module.exports.help = {
+    name: 'whois',
+    aliases: ['user-info']
+};