Prevent blacklisted users from playing games

commands/games-mp/chess.js

@@ -60,6 +60,7 @@ module.exports = class ChessCommand extends Command {
 
 	async run(msg, { opponent, time, fen }) {
 		if (opponent.id === msg.author.id) return msg.reply('You may not play against yourself.');
+		if (this.client.blacklist.user.includes(opponent.id)) return msg.reply('This user is blacklisted.');
 		const current = this.client.games.get(msg.channel.id);
 		if (current) return msg.reply(`Please wait until the current game of \`${current.name}\` is finished.`);
 		this.client.games.set(msg.channel.id, { name: this.name });