所以当新成员加入Guild[不和谐服务器]时。机器人应该在某个频道（ID = 766716351007686696）发送消息，向他们发送直接消息，然后添加角色（Human Bean）。这是我现在拥有的代码，它不起作用，底部有错误client.on('guildMemberAdd', member =>{    const channel = message.guild.channels.cache.find(c => c.id === "766716351007686696")    const channelwelcomeEmbed = new Discord.MessageEmbed()        .setColor('#ffd6d6')        .setTitle('Welcome!')        .setDescription(`${member} just joined the discord! Make sure to read #rules!`)        .setTimestamp();    channel.send(channelwelcomeEmbed);    const dmwelcomeEmbed = new Discord.MessageEmbed()        .setColor('#ffd6d6')        .setTitle('Welcome!')        .setDescription("For Help Using @Pro Bot#7903, Send The Command `!help` In Server")        .setTimestamp();    member.send(dmwelcomeEmbed);    let role6 = message.guild.roles.cache.find(role => role.name == "Human Bean"); //BASIC ROLE, EVERYONE GETS IT    if(!role6) return message.reply("Couldn't find that Role .")    member.roles.add(role6);});错误消息是；    const channel = message.guild.channels.cache.find(c => c.id === "766716351007686696")                    ^ReferenceError: message is not defined