added main voice dependencies

commands/join.js

@@ -2,7 +2,7 @@ module.exports = {
     name: 'join',
     description: 'joins a voice channel',
     execute: async (message, voiceChannel, args) => {
+        if (!voiceChannel) return message.reply('you need to join a channel!');
         connection = await voiceChannel.join();
-        connection.play('https://www.youtube.com/watch?v=Hl1s4BT9Fc4');
     }
 };