Why is this DB function returning undefined?

I'm trying to make a function where I can easily call my MongoDB.

This is the function code/hanlder:

let get = {};

get.getGuildData = (id) => {
    const guildData = require('./models/guilds.js')
    guildData.findById(id).then(async (data) => {
    return guildData.findById(id)
    })
};

module.exports = { get }

This is where I am calling the function:

const getGuild = bee.get.getGuildData(msg.guildID)
console.log(getGuild)

It returns undefined, but the console.log on the actual function returns the correct thing:

Let me know if anyone knows a solution to this.

I can not find an answer in this post. How do I return the response from an asynchronous call?

You cannot return the data, because it doesn't exist yet. What you can do is return a promise. guildData.findById(id) apparently is already returning a promise which resolves to the data, so you do not need to call .then on it to create a new promise.

get.getGuildData = (id) => {
  const guildData = require('./models/guilds.js')
  return guildData.findById(id);
};

Since the function is now returning a promise, any code that calls it will need to work with promises. Either call .then on the promise:

bee.get.getGuildData(msg.guildID)
  .then(data => {
    console.log(data);
  });

Or if you're in an async function, use await:

async function someFunction() {
  const data = await bee.get.getGuildData(msg.guildID);
  console.log(data);
}