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: jwt.go
    path of file: ./repos/learning_tools/go-kit/v11/utils
    
    the code of the file until where you have to start completion: package utils

import (
	"time"

	"github.com/golang-jwt/jwt/v4"
)

var jwtSecret = []byte("jwtSecret_v4")

const JWT_CONTEXT_KEY = "jwt_context_key"

type Token struct {
	Name string
	DcId int
	jwt.StandardClaims
}

func CreateJwtToken(name string, dcId
    
func ParseToken(token string) (jwt.MapClaims, error) {
	jwtToken, err := jwt.ParseWithClaims(token, jwt.MapClaims{}, func(token *jwt.Token) (i interface{}, err error) {
		return jwtSecret, nil
	})
	if err != nil || jwtToken == nil {
		return nil, err
	}
	claim, ok := jwtToken.Claims.(jwt.MapClaims)
	if ok && jwtToken.Valid {
		return claim, nil
	} else {
		return nil, nil
	}
}