Creating a Scheduled Event in Discord | discord.js

With Discord recently adding GuildScheduledEvents to their API, I wanted to make a bot that can create events (on SlashCommand), but I can't get the whole GuildScheduledEvent and GuildScheduledEventManager to work.

I keep getting errors like this:

TypeError: Cannot read properties of undefined (reading 'options')
at new CachedManager (C:\dev\Discord Bots\node_modules\discord.js\src\managers\CachedManager.js:21:64)
at new GuildScheduledEventManager (C:\dev\Discord Bots\node_modules\discord.js\src\managers\GuildScheduledEventManager.js:17:5)
at Object.execute (C:\dev\Discord Bots\better bot\bot-data\commands\cancel_film.js:11:31)
at Client.<anonymous> (C:\dev\Discord Bots\better bot\main.js:44:17)
at Client.emit (node:events:513:28)
at InteractionCreateAction.handle (C:\dev\Discord Bots\node_modules\discord.js\src\client\actions\InteractionCreate.js:97:12)
at module.exports [as INTERACTION_CREATE] (C:\dev\Discord Bots\node_modules\discord.js\src\client\websocket\handlers\INTERACTION_CREATE.js:4:36)
at WebSocketManager.handlePacket (C:\dev\Discord Bots\node_modules\discord.js\src\client\websocket\WebSocketManager.js:354:31)
at WebSocketManager.<anonymous> (C:\dev\Discord Bots\node_modules\discord.js\src\client\websocket\WebSocketManager.js:238:12)
at WebSocketManager.emit (C:\dev\Discord Bots\node_modules\@vladfrangu\async_event_emitter\dist\index.js:282:31)

I know where it gets the error, but I don't understand why.

This is the code from the SlashCommand:

const { SlashCommandBuilder, GuildScheduledEventManager, GuildScheduledEventPrivacyLevel, GuildScheduledEventEntityType } = require('discord.js');

module.exports = {
    data: new SlashCommandBuilder()
        .setName('test_command')
        .setDescription('a test command')
    async execute(interaction) {
        const event_manager = new GuildScheduledEventManager('1039213773216546939')

        await event_manager.create({
            name: 'Test Event',
            scheduledStartTime: new Date(1687284000000),
            privacyLevel: GuildScheduledEventPrivacyLevel.GuildOnly,
            entityType: GuildScheduledEventEntityType.Voice,
            description: 'This is a test Scheduled Event',
            channel: '1118952214774419569',
            image: null,
            reason: 'Testing with creating a Scheduled Event'
        });
    }
}

(I am using Node.js btw)

Is there anybody that can help me?

I think it's because the GuildScheduledEventManager constructor accepts a guild and 1039213773216546939 is a guild ID(?), not a guild object.

Inside the constructor, super is called with guild.client. As your guild is a string, its client property is undefined and you pass this undefined to CachedManager. In the CachedManager's constructor, it can't read the options property of undefined so it throws "TypeError: Cannot read properties of undefined (reading 'options')".

To fix this, you need to pass down a guild instead. You can get it from interaction.client.guilds:

module.exports = {
  data: new SlashCommandBuilder()
    .setName('test_command')
    .setDescription('a test command'),

  async execute(interaction) {
    const guildID = '1039213773216546939';
    const guild = interaction.client.guilds.cache.find(guildID);
    
    if (!guild)
      return console.log('Guild not found');

    const event_manager = new GuildScheduledEventManager(guild);

    await event_manager.create({
      name: 'Test Event',
      scheduledStartTime: new Date(1687284000000),
      privacyLevel: GuildScheduledEventPrivacyLevel.GuildOnly,
      entityType: GuildScheduledEventEntityType.Voice,
      description: 'This is a test Scheduled Event',
      channel: '1118952214774419569',
      image: null,
      reason: 'Testing with creating a Scheduled Event',
    });
  },
};