I'm kind of stuck with this portion of the code. I'm currently coding a discord bot for a school project as well as personal use. The main purpose of the discord bot is to send embeds and casual commands where someone says "goodnight" and the bot will respond goodnight. For the goodnight part of the code, I have it pretty much written correctly, but how do I get it to respond by tagging the persons discord tag? such as instead of my current code being else if (message.content === 'goodnight'){ message.channel.send('Goodnight!'); How would I get it to say "Goodnight @discordtag"

Secondly, the embed portion of the code is what I'm struggling with the most. I'm pretty much following the guides on https://discordjs.guide as well as some youtube videos, but I seem to not be able to find the answer. I'm getting the error "channel.send({ embeds: [exampleEmbed] }); ^

TypeError: Cannot read properties of undefined (reading 'send')

My code for the example embed is:

const channel = client.channels.cache.get('912186200910102559')
const exampleEmbed = new MessageEmbed()
        .setColor('#5104DB')
        .setTitle("Boombap's Cookout Rules")
        .setAuthor({ name: 'Rules', iconURL: 'https://gridfiti.com/wp-content/uploads/2021/04/Gridfiti_Blog_AnimeCars_NissanSilviaS13.jpg'})
        .addFields(
            { name: 'Rule 1', value: 'No racist, sexist or any type of hate speech towards other members.'},
            { name: 'Rule 2', value: 'No scamming.'},
            { name: 'Rule 3', value: 'No discussions of anything illegal, if you think it might be just do not mention it in the discord.'},
            { name: 'Rule 4', value: 'No advertisements of other services.'}

        )

channel.send({ embeds: [exampleEmbed] });