Added kick command.

commands/kick.js

+const errors = require('../errors.json');
+
+exports.run = async (client, message, args, connection) => {
+    if (!message.member.hasPermission('KICK_MEMBERS')) {
+        message.channel.send(errors.insufficient_permission_for_user).catch(e => {
+            return;
+        });
+        return;
+    };
+
+    const user = message.mentions.users.first() || message.guild.members.cache.get(args[0]);
+    if (!user) {
+        message.channel.send(errors.insufficient_args).catch(e => {
+            return;
+        });
+        return;
+    };
+
+    let reason = args.slice(1).join(' ');
+    if (reason == null) {
+        reason = "Unspecified."
+    };
+
+    if(message.guild.member(user).roles.highest.position >= message.member.roles.highest.position) {
+        message.channel.send(errors.equal_or_more_permission).catch(e => {
+            return;
+        });
+        return;
+    };
+
+    if (!message.guild.member(user).kickable) {
+        message.channel.send(errors.insufficient_permission_for_bot).catch(e => {
+            return;
+        });
+        return;
+    };
+
+    await message.guild.member(user).kick({reason: reason}).catch(e => {
+        message.channel.send(errors.unknown_error).catch(e => {
+            return;
+        });
+        return;
+    });
+
+    message.channel.send('Successfully performed kick on specified user.').catch(e => {
+        return;
+    });
+};
+
+module.exports.help = {
+    name: 'kick',
+    aliases: []
+};
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