async getChannels(id, timeout) {
    const { channels } = await this.request(RPCCommands.GET_CHANNELS, {
      timeout,
      guild_id: id,
    });
    return channels;
  }
Get all channels
@param {Snowflake} [id] Guild ID
@param {number} [timeout] Timeout request
@returns {Promise<Collection<Snowflake, Channel>>}