discord.js#12.5.3 add role command - discord

Question

I'm trying to make a add role and remove role command, I've tried before and given up since I could never get my head around it. I want the command to allow someone to mention a user then mention a role and give/take that role to/from the user. The command doesn't give the role and it seems like content.replace doesnt work either. Here is my code for the give role command:
module.exports = {
name: "addrole",
description: "Give a role to a user",
aliases: ["+role", "giverole", "give-role"],
cooldown: 3,
permissions: "MANAGE_ROLES",
execute(msg, args){
const Discord = require('discord.js');
require("discord-reply")
const { colour } = require('../config.json')
const { version } = require('../config.json')
const { prefix } = require('../config.json')
let user = msg.mentions.users.first() || msg.author
//v e.g $ addrole #user test role = test role
let r1 = msg.content.replace(`${prefix} ${args[2]} ${user} `, ``)//removes everything before role name
//^ content.replace doesn't seem to work
let role = msg.guild.roles.cache.find(r => r.name === r1);
if (!r1) { //checks for anything after the user
msg.channel.send("You need to give a role name")
} else if (!role) {
msg.channel.send("That role doesn't exist")
} else return
user.roles.add(role).catch(console.error);
console.log(`Made it this far`)
}
}

Answer 1

In my modest experience I think your args[2] does not exist because, according to your snippet, you should've already created a messageCreate event and defined command. So try using:
let r1 = msg.content.replace(`${prefix}role ${user}`, ``)
// Or ${prefix}addrole/+role ${user}
let role = msg.guild.roles.cache.find(r => r.name === r1);