func checkTelegramAuthorization(data map[string]string) bool {

	hash := data["hash"]
	delete(data, "hash")

	var dataCheckList []string
	for k, v := range data {
		dataCheckList = append(dataCheckList, k+"="+v)
	}
	sort.Strings(dataCheckList)
	dataCheckString := strings.Join(dataCheckList, "\n")

	sha256Hash := sha256.New()

	sha256Hash.Write([]byte(botToken))
	hmacHash := hmac.New(sha256.New, sha256Hash.Sum(nil))
	hmacHash.Write([]byte(dataCheckString))

	return hex.EncodeToString(hmacHash.Sum(nil)) == hash
}