How can I re-send an attachment from a message? - discord.js

Question

So, what I want to do is something like this:
User: sends a command like this: mybot!announce #mention (message) (Attachs image)
Bot: gets the mention, message & attachment from the message, and deletes it. Then resends the message in an embed (see picture).
I managed to do everything else but I can't get the attachment & re-send it in the embed. Please, help :p
Here is the code I actually have, in case you need it:
if (command === 'announce')
{
var mention = args[0];
if (!args[0]) return message.channel.send('You need to mention someone!');
var actualMention = null;
if (mention === '#everyone')
{
actualMention = message.mentions.members.every();
}
else
{
actualMention = message.mentions.members.first();
}
var messageAnnouncement = args.slice(1).join(" ");
if (msgAnnouncement === null) return message.channel.send('You need to put the announcement itself!');
var imageAttachments = message.attachments;
const anunouncementEmbed = new Discord.MessageEmbed()
.setAuthor('YPBot - Announcement')
.setTitle(message.author.tag + ' made an announcement')
.setDescription('Mentioning: ' + mention + '\n\n' +
msgAnnouncement)
.setThumbnail(imageAttachments[0]);
message.channel.send(anunouncementEmbed);
}
Hope I explained myself well. In case I didn't, feel free to ask anything.

Answer 1

Message#attachments actually returns a Collection, so if you want the first element you need Collection#first(). From there you can access the MessageAttachment#url property.
.setThumbnail(imageAttachments.first().url);