add new decrypt encrypt function to member

utils/utils.go

@@ -1,6 +1,9 @@
 package utils
 
 import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
 	"fmt"
 	"net/mail"
 	"time"
@@ -34,3 +37,9 @@ func GetCurrentTime(loc *time.Location) string {
 func GetCurrentDay(loc *time.Location) string {
 	return fmt.Sprint(time.Now().In(loc).Weekday())
 }
+
+func HashField(field string, token []byte) string {
+	h := hmac.New(sha256.New, token)
+	h.Write([]byte(field))
+	return hex.EncodeToString(h.Sum(nil))
+}