user.ban is Not a function? - discord.js

Question

I was trying to make a ban command where you can ban a user with a reason.
Turns out user.ban is not a function in Discord.js V12 even though it should be.
Here is my code.
const { MessageEmbed } = require('discord.js');
module.exports = {
name: 'ban',
description: 'Bans a user.',
category: 'Moderation',
usage: '^ban <user> <reason>',
run: async (bot, message, args) => {
if (!message.member.hasPermission('BAN_MEMBERS')) {
return message.channel.send('You do not have permission to do this! ❌');
}
if (!message.guild.me.hasPermission('BAN_MEMBERS')) {
return message.channel.send('I do not have permission to do this! ❌');
}
const user = message.mentions.users.first();
if (!user) {
return message.channel.send('User was not specified. ❌');
}
if (user.id === message.author.id) {
return message.channel.send('You cannot ban yourself! ❌');
}
let reason = message.content
.split(' ')
.slice(2)
.join(' ');
if (!reason) {
reason = 'No reason provided.';
}
let Embed = new MessageEmbed()
.setTitle(`Justice! | Ban Action`)
.setDescription(`Banned \`${user}\` - Tag: \`${user.discriminator}\``)
.setColor('ORANGE')
.setThumbnail(user.avatarURL)
.addField('Banned by', `\`${message.author.username}\``)
.addField(`Reason?`, `\`${reason}\``)
.setTimestamp();
message.channel.send(Embed);
user.ban(reason);
},
};
Is there a way to fix this?

Answer 1

You're getting a User instead of a GuildMember. A User represents a person on discord, while a GuildMember represents a member of a server. You can get a GuildMember instead of a User by using mentions.members instead of mentions.users ex:
const user = message.mentions.members.first()