title: How to check channel permissions?
body: <p>You can lock channel but if someone executes the command again how to send a message back that channel is already locked.</p>
  
  <pre><code>if (command === "lock") {
    await message.channel.overwritePermissions(message.guild.defaultRole, {
      SEND_MESSAGES: false
    });
    return message.channel.send(`:lock: The channel is now locked..\nUse \`k!unlock\` to end lockdown.. `);
  }
  </code></pre>