You have two options.
You can either use the toString
method on the User object, or form the mention yourself using the user’s ID.
Here’s an example using toString:
client.on("message", => {
const channel = message.channel;
channel.send(message.author.toString());
});
And here’s an example using the ID
client.on("message", => {
const channel = message.channel;
channel.send("<@" + message.author.id + ">");
});
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