discord.js Say Command Emase

// SENDS WHAT YOU SAY BUT IN EMBED //
// EXAMPLE : !embed Hello, Everyone //
client.on('message', message => {
    if (message.content.toLowerCase().startsWith(prefix + 'embed')) {
        const MyMessage = message.content.slice(9).trim();
        const TestEmbed = new Discord.MessageEmbed()
            .setColor('#b700ff')
            .setTitle('Embed')
            .addField(" \u200B ", "```" + MyMessage + "```")
        message.channel.send(TestEmbed)
    }
})
Undefined