问Discord.js通过ID获取用户

EN

if(command === "avatar" || command === "av") {
               const user = message.mentions.users.first() || client.users.cache.get(args[0]) || message.author
       if (!user) {
       user = message.author;
       }
      
          const member = message.guild.member(user)
          const avatar = user.avatarURL({dynamic:true})
          if (!avatar) return message.channel.send("This user doesn't have an avatar to show")
          const embed = new Discord.MessageEmbed()
             .setTitle(`${user.username}'s avatar`)
             .setColor('RANDOM')
             .setDescription(`[Click here for the image link](${avatar})`)
             .setImage(avatar)
             .setFooter(`${client.user.username} 2021`)
             .setTimestamp()
     
         message.channel.send(embed)