My Welcome Message And Auto Role Doesn't Work

const Discord = require('discord.js')
const client = new Discord.Client()

client.on('guildMemberAdd', (member) => {
    const welcomeChannelId = {
        '1058088182861791282': '1058088182861791284'
    }
    const guild = client.guilds.cache.get("1058088182861791282")
    member.guild.channels.cache.get(welcomeChannelId[member.guild.id]).send(`:wave: Welcome ${m} to **${guild}**! We are now at **${guild.memberCount} members**. Thank you for joining!`)
    const MemberRoleAdd = member.guild.roles.cache.get('1058187823703916604')
    member.roles.add(MemberRoleAdd)
})