我有一個機器人，如果您在非命令通道中使用命令，它會發送一條消息，它會告訴您僅在正確的通道中使用命令，但我希望它不會影響具有員工角色的人員，這是我得到的代碼這個錯誤TypeError: Cannot read property 'roles' of null 我的代碼：client.on('message', message => {if(!message.member.roles.cache.has(784236433975541771)) {  if (message.content.startsWith("-")) {  if (message.channel.id === '759066524605612108') return;  if (message.channel.id === '775035651640918067') return;  if (message.channel.id === '777287305580511262') return;    message.channel.send('You have been pinged in the <#759066524605612108> channel with the results to your command. Please only use commands there.');  }else  if (message.content.startsWith("!")) {  if (message.channel.id === '759066524605612108') return;  if (message.channel.id === '775035651640918067') return;  if (message.channel.id === '777287305580511262') return;    message.channel.send('Rank has been disabled in this channel. Please only use commands in the <#759066524605612108> channel.');  }}});我正在嘗試這樣做是discord.js v12