Function createAnnouncement

createAnnouncement(
    this: API,
    channel: { description: string; name: string },
    user_targets: (number | User)[],
    message: string,
): Promise<Chat.Channel>
Create a new announcement!
Parameters
- this: API
- channel: { description: string; name: string }
  Details of the channel you're creating
- user_targets: (number | User)[]
  The people that will receive your message
- message: string
  The message to send with the announcement
Returns Promise<Chat.Channel>
The newly created channel!

Scope
"chat.write_manage"

Remarks
From my understanding, this WILL 403 unless the user is kinda special
- Defined in namespaces/Chat.ts:109