Discord.js - .createdAt() 不是一个有效的函数

Question

我正在尝试做的是，每当有人加入服务器时，机器人就会发送包含他们的 ID、用户创建日期和新成员总数的丰富嵌入，但是每当我运行它并测试它时，它都会显示 @987654321 @ 不是一个有效的函数，所以我完全不知道该怎么做。

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client.on("guildMemberAdd", member => {
  let mlogchannel = member.guild.channels.find((channel => channel.name === "member-logging"));
  if (mlogchannel) {
    console.log(client.users.find(user => user.id === member.id).createdAt())
    var cdate = moment.utc(User.createdAt()).format("dddd, MMMM Do YYYY, HH:mm");
    const sInfo = new Discord.RichEmbed()
      .setTitle(`Member joined`)
      .setAuthor(`${member.displayName}`)
      .setColor(8528115)
      .setFooter(`User ID: ${member.id}`)
      .setTimestamp()
      .setThumbnail(member.user.createdAt())
      .addField("Total members", `${Guild.members.filter(member => !member.user.bot).size}`, true)
      .addField("Creation Date:", `${cdate}`, true);
    let ageS = moment(cdate).fromNow(true)
    let ageA = ageS.split(" ");
    if (ageA[1] = "days" && ageA[2] >= 30) {
      Guild.channels.find((channel => channel.name === "member-logging").send(sInfo));
      mlogchannel.send("**WARNING!**\nThis account is less than 30 days old and may have been made to bypass a server mute or ban!")
    }
    if (ageA[1] != "days") {
      mlogchannel.send(sInfo)
    }
    if (!mlogchannel) {
      return console.log(`${Guild.name}:${Guild.ID} Has not set up a member log channel!`)
    }
  }
})

Answer 1

User.createdAt 是用户的属性，而不是方法。所以不是.setThumbnail(member.user.createdAt())，而是.setThumbnail(member.user.createdAt)。