Fixed unmute command.

commands/unmute.js

@@ -6,7 +6,7 @@ exports.run = async(client, message, args) => {
 
     if (message.member.hasPermission("MANAGE_ROLES")){
 
-    let spammer = message.guild.member(message.mentions.users.first() || message.guild.members.get(args[0]));
+    let spammer = message.guild.member(message.mentions.users.first() || message.guild.members.cache.get(args[0]));
     let role = message.guild.roles.cache.find(r => r.name === "Muted");
     if(!role) return;