added commando

commands/music/leave.js

@@ -0,0 +1,23 @@
+const { Command } = require('discord.js-commando');
+
+module.exports = class Leave extends Command {
+    constructor(client) {
+        super(client, {
+            name: 'leave',
+            memberName: 'leave',
+            group: 'music',
+            description: 'leaves a voice channel',
+            guildOnly: true
+        });
+    }
+
+    async run(message) {
+        if (!message.member.voice.channel) return message.reply('you need to join a channel!');
+
+        const voiceChannel = message.member.voice.channel;
+
+        voiceChannel.leave();
+
+        return message.say('left!');
+    }
+}