You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: connparams.go
    path of file: ./repos/slack/examples/connparams
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"log"
	"net/url"
	"os"

	"github.com/slack-go/slack"
)

func main() {
	token, ok := os.LookupEnv("SLACK_TOKEN")
	if !ok {
		fmt.Println("Missing SLACK_TOKEN in environment")
		os.Exit(1)
	}
	api := slack.New(
		token,
		slack.OptionDebug(true),
		slack.OptionLog(log.New(os.Stdout, "slack-bot: ", log.Lshortfile|log.LstdFlags)),
	)

	// turn on the batch_presence_aware option
	rtm := api.NewRTM(slack.RTMOptionConnParams(url.Values{
		"batch_presence_aware": {"1"},
	}))
	go rtm.ManageConnection()

	for msg := range rtm.IncomingEvents {
		fmt.Print("Event Received: ")
		switch ev := msg.Data.(type) {
		case *slack.HelloEvent:
			// Replace USER-ID-N here with your User IDs
			rtm.SendMessage(rtm.NewSubscribeUserPresence([]string{
				"USER-ID-1",
				"USER-ID-2",
			}))

		case *slack.ConnectedEvent:
			fmt.Println("Infos:", ev.Info)
			fmt.Println("Connection counter:", ev.ConnectionCount)
			// Replace C2147483705 with your Channel ID
			rtm.SendMessage(rtm.NewOutgoingMessage("Hello world", "C2147483705"))

		case *slack.MessageEvent:
			fmt.Printf("Message: %v\n", ev)

		case *slack.PresenceChangeEvent:
			fmt.Printf("Presence Change: %v\n", ev)

		case *slack.LatencyReport:
			fmt.Printf("Current latency: %v\n", ev.Value)

		case *slack.RTMError:
			fmt.Printf("Error: %s\n", ev.Error())

		case *slack.InvalidAuthEvent:
	
    
func main() {
	token, ok := os.LookupEnv("SLACK_TOKEN")
	if !ok {
		fmt.Println("Missing SLACK_TOKEN in environment")
		os.Exit(1)
	}
	api := slack.New(
		token,
		slack.OptionDebug(true),
		slack.OptionLog(log.New(os.Stdout, "slack-bot: ", log.Lshortfile|log.LstdFlags)),
	)

	// turn on the batch_presence_aware option
	rtm := api.NewRTM(slack.RTMOptionConnParams(url.Values{
		"batch_presence_aware": {"1"},
	}))
	go rtm.ManageConnection()

	for msg := range rtm.IncomingEvents {
		fmt.Print("Event Received: ")
		switch ev := msg.Data.(type) {
		case *slack.HelloEvent:
			// Replace USER-ID-N here with your User IDs
			rtm.SendMessage(rtm.NewSubscribeUserPresence([]string{
				"USER-ID-1",
				"USER-ID-2",
			}))

		case *slack.ConnectedEvent:
			fmt.Println("Infos:", ev.Info)
			fmt.Println("Connection counter:", ev.ConnectionCount)
			// Replace C2147483705 with your Channel ID
			rtm.SendMessage(rtm.NewOutgoingMessage("Hello world", "C2147483705"))

		case *slack.MessageEvent:
			fmt.Printf("Message: %v\n", ev)

		case *slack.PresenceChangeEvent:
			fmt.Printf("Presence Change: %v\n", ev)

		case *slack.LatencyReport:
			fmt.Printf("Current latency: %v\n", ev.Value)

		case *slack.RTMError:
			fmt.Printf("Error: %s\n", ev.Error())

		case *slack.InvalidAuthEvent:
			fmt.Printf("Invalid credentials")
			return

		default:

			// Ignore other events..
			// fmt.Printf("Unexpected: %v\n", msg.Data)
		}
	}
}