通道静音命令Discordjs

Question

我试图执行一个+ cmute命令，该命令将锁定每个人从该频道进行的键入访问。这是我尝试的代码：

    name: 'cmute',
    description: 'Mutes the specified channel.',
    aliases: ['commands'],
    usage: '[command name]',
    cooldown: 5,
    execute(message, args) {
        if (member.roles.has('640623199817826324') === true) {
         channel.overwritePermissions(channel.guild.defaultRole, { SEND_MESSAGES: false })}
        if (member.roles.has('640623199817826324') === false) {
          message.reply(`You don't have permissions to do this!`)
        }
        };