func (s *Slacker) Init(initHandler func()) {
	s.initHandler = initHandler
}
Init handle the event when the bot is first connected
package slacker
import (
	"context"
	"errors"
	"fmt"
	"github.com/shomali11/proper"
	"github.com/slack-go/slack"
	"github.com/slack-go/slack/slackevents"
	"github.com/slack-go/slack/socketmode"
)
const (
	space               = " "
	dash                = "-"
	star                = "*"
	newLine             = "\n"
	invalidToken        = "invalid token"
	helpCommand         = "help"
	directChannelMarker = "D"
	userMentionFormat   = "<@%s>"
	codeMessageFormat   = "`%s`"
	boldMessageFormat   = "*%s*"
	italicMessageFormat = "_%s_"
	quoteMessageFormat  = ">_*Example:* %s_"
	authorizedUsersOnly = "Authorized users only"
	slackBotUser        = "USLACKBOT"
)
var (
	errUnauthorized = errors.New("you are not authorized to execute this command")
)
func NewClient(botToken, appToken string, options ...ClientOption) *Slacker {
	defaults := newClientDefaults(options...)
	api := slack.New(
		botToken,
		slack.OptionDebug(defaults.Debug),
		slack.OptionAppLevelToken(appToken),
	)
	smc := socketmode.New(
		api,
		socketmode.OptionDebug(defaults.Debug),
	)
	slacker := &Slacker{
		client:             api,
		socketModeClient:   smc,
		commandChannel:     make(chan *CommandEvent, 100),
		errUnauthorized:    errUnauthorized,
		botInteractionMode: defaults.BotMode,
	}
	return slacker
}
type Slacker struct {
	client                  *slack.Client
	socketModeClient        *socketmode.Client
	botCommands             []BotCommand
	botContextConstructor   func(ctx context.Context, api *slack.Client, client *socketmode.Client, evt *MessageEvent) BotContext
	requestConstructor      func(botCtx BotContext, properties *proper.Properties) Request
	responseConstructor     func(botCtx BotContext) ResponseWriter
	initHandler             func()
	errorHandler            func(err string)
	interactiveEventHandler func(*Slacker, *socketmode.Event, *slack.InteractionCallback)
	helpDefinition          *CommandDefinition
	defaultMessageHandler   func(botCtx BotContext, request Request, response ResponseWriter)
	defaultEventHandler     func(interface{})
	errUnauthorized         error
	commandChannel          chan *CommandEvent
	appID                   string
	botInteractionMode      BotInteractionMode
}
func (s *Slacker) BotCommands() []BotCommand {
	return s.botCommands
}
func (s *Slacker) Client() *slack.Client {
	return s.client
}
func (s *Slacker) SocketMode() *socketmode.Client {
	return s.socketModeClient
}