如何解决在discord.js中从集合中获取用户的问题？

Question

I'm trying to retrieve usernames from IDs in collection (Discord.js)

I've tried fetching user with client.fetchUser(config.userID)

const adm = client.fetchUser(config.admins)
const embed = new Discord.RichEmbed()
.setTitle("Developers")
.setDescription("Usernames: \n"+adm.username)
message.channel.send(embed);

It outputs "userID1,userID2 is not a snowflake"

Answer 1

The docs say that the parameter should be a snowflake Snowflake Ref

From what I can see, you are passing in an array of snowflakes which won't work.

The method returns a Promise of type User, I think you are trying to get all the users in one go.

I have created a code snip which will fetch the users one by one from your snowflake array of Admins and then create a string for you to put in your message.

Remember to use this in an ASYNC method else the await will throw an error.

Edit : As mentioned in the comments, you need to initialise the adminUsers before you can push to it.

let adminUsers = []; // array of Users

for (let i = 0; i < config.admins.length; i++) {
  let currentUser = config.admins[i];
  let user = await client.fetchUser(currentUser);
  adminUsers.push(user);
}

let description = "Usernames: \n";

adminUsers.forEach(user => {
  description += `${user.username}\n`;
});

const embed = new Discord.RichEmbed()
  .setTitle("Developers")
  .setDescription(description)
message.channel.send(embed);