如何在Discord.js中将User转换为GuildMember？

我在用.addUserOption开发ban斜杠命令时，尝试获取目标用户的权限以避免机器人因封禁管理员崩溃，但出现错误。已明确原因：无法从User对象获取权限，仅能通过GuildMember对象获取，请教如何将User转换为GuildMember？

参考代码：

const { SlashCommandBuilder } = require('@discordjs/builders');
const { MessageEmbed } = require('discord.js')

module.exports = {
    data: new SlashCommandBuilder()
        .setName("ban")
        .setDescription("Bans the specified user!")
        .addUserOption((option) =>
        option
            .setName("user")
            .setDescription('Who do you want to ban?')
            .setRequired(true)
            )
        .addStringOption((option) => 
        option
            .setName('reason')
            .setDescription("Whats the reason youre banning this user?")
            ),
    async execute(client, interaction) {
        if (client.cooldowns.has(interaction.user.id)) {
            let cooldownEmbed = new MessageEmbed()
                .setTitle("Please wait for the cooldown to end.")
                .setDescription("This is so that the bot doesnt overload")
                .setColor("RED")
               .setFooter("The cooldown is 5 sec")
               .setTimestamp()
          interaction.reply({ embeds: [cooldownEmbed], ephemeral: true });
       } else {
                const user = interaction.member
                const permission = user.permissions.has('BAN_MEMBERS');
                
                let embed = new MessageEmbed()
                    .setTitle("❌️ | You dont have the permissions to use this command.")
                if(!permission)
                    return interaction.reply({embeds: [embed]})
            
                const tgt = interaction.options.getUser('user')
                
                   let permsEmbed = new MessageEmbed()
                    .setTitle("The user you are trying to ban is an Administrator!")
                    .setColor("RED")
                if (tgt.permissions.has('BAN_MEMBERS')) return interaction.reply({ embeds: [permsEmbed]})
                const reason = interaction.options.getString('reason') || "No reason specified"


       client.cooldowns.set(interaction.user.id, true);

       setTimeout(() => {
           client.cooldowns.delete(interaction.user.id);
       }, client.COOLDOWN_SECONDS * 1000);

       }
   }
}

方法1：直接获取GuildMember（推荐） #

不需要先获取User再转换，直接用interaction.options.getMember('user')就能拿到目标用户的GuildMember对象：

const tgtMember = interaction.options.getMember('user');

替换原代码中const tgt = interaction.options.getUser('user')这一行，之后即可正常进行权限检查：

if (tgtMember.permissions.has('BAN_MEMBERS')) {
    return interaction.reply({ embeds: [permsEmbed]})
}

方法2：从User对象转换为GuildMember #

如果必须先获取User对象，可通过服务器成员API获取对应的GuildMember（异步操作需加await）：

const tgtUser = interaction.options.getUser('user');
const tgtMember = await interaction.guild.members.fetch(tgtUser.id);

注意事项 #

• 确保机器人拥有GUILD_MEMBERS权限，否则fetch操作可能失败
• 若目标用户不在当前服务器，getMember会返回null，需提前做空值判断

内容的提问来源于stack exchange，提问作者stixyyST5