new error codes, code refactor, added getMessages function

middleware/protected.go

@@ -1,10 +1,13 @@
 package middleware
 
 import (
+	"fmt"
 	jwtware "github.com/gofiber/contrib/jwt"
 	"github.com/gofiber/fiber/v2"
 	"github.com/golang-jwt/jwt/v5"
+	"github.com/google/uuid"
 	"os"
+	"relay-server/helpers"
 	"relay-server/model"
 )
 
@@ -17,8 +20,11 @@ func Protected() fiber.Handler {
 		SuccessHandler: func(c *fiber.Ctx) error {
 			user := c.Locals("user").(*jwt.Token)
 			claims := user.Claims.(*model.UserClaims)
-
-			c.Locals("userID", claims.UserID)
+			userID, err := uuid.Parse(claims.UserID)
+			if err != nil {
+				return helpers.NewError(helpers.ErrInternal, "internal server error", fmt.Errorf("failed to parse user ID: %w", err))
+			}
+			c.Locals("userID", userID)
 			c.Locals("username", claims.Username)
 			return c.Next()
 		},