TypeError：message.client.commands.get（...）。execute不是一个函数

module.exports = {
    name: 'search',
    aliases: ['search'],
    description: 'Search and select videos to play.',
    run: async (client, message, args) => {
        if (!args.length)
            return message.reply(`Usage: ${message.client.prefix}${module.exports.name} <Video Name>`).catch(console.error);
        if (message.channel.activeCollector)
            return message.reply("A message collector is already active in this channel.");
        if (!message.member.voice.channel)
            return message.reply("You need to join a voice channel first!").catch(console.error);

        const search = args.join(" ");

        let resultsEmbed = new MessageEmbed()
            .setTitle(`**Reply with the song number you want to play**`)
            .setDescription(`Results for: ${search}`)
            .setColor(COLORS.DARK_RED);

        try {
            const results = await youtube.searchVideos(search, 20);
            results.map((video, index) => resultsEmbed.addField(video.shortURL, `${index + 1}. ${video.title}`));

            var resultsMessage = await message.channel.send(resultsEmbed);

            function filter(msg) {
                const pattern = /(^[1-9][0-9]{0,1}$)/g;
                return pattern.test(msg.content) && parseInt(msg.content.match(pattern)[0]) <= 20;
            }

            message.channel.activeCollector = true;
            const response = await message.channel.awaitMessages(filter, {
                max: 1,
                time: 30000,
                errors: ["time"]
            });
            const choice = resultsEmbed.fields[parseInt(response.first()) - 1].name;

            message.channel.activeCollector = false;
            message.client.commands.get("play").execute(message, [choice]);
            resultsMessage.delete().catch(console.error);
        } catch (error) {
            console.error(error);
            message.channel.activeCollector = false;
        }
    }
};

我的代码有问题，当我运行代码时，它会向我嵌入歌曲列表，但是当我选择歌曲时，出现错误TypeError：message.client.commands.get（...）。execute第49行的函数不是函数吗？