javascript - Discord JS：如何删除漫游器在DM中发送的所有消息？(Discord JS: How do I delete all messages the bot has sent in DM's?)

Question

I'm trying to make my bot delete all DM's from a user ID.(我试图让我的机器人从用户ID中删除所有DM。)

How would I get about doing this?(我将如何做呢？) I have tried using the DMchannel function but I am struggling.(我已经尝试使用DMchannel函数，但是我很挣扎。) The following code is what I have tried(以下代码是我尝试过的)

const dmCount = client.users.get("508625644792446986").dmChannel
var fetched =  dmCount.fetchMessages({limit: 99});
dmCount.bulkDelete(fetched)

I don't see what I'm doing wrong here, any suggestions on how to fix this?(我在这里看不到我在做什么错，关于如何解决此问题的任何建议？)

The error is:(错误是：)

TypeError: Cannot read property 'fetchMessages' of null

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