update middleware.go, response.go

pkg/util/response.go

@@ -0,0 +1,15 @@
+package util
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+type error struct {
+	Message string `json:"message"`
+}
+
+func NewErrorResponse(c *gin.Context, statusCode int, message string) {
+	logrus.Error(message)
+	c.AbortWithStatusJSON(statusCode, error{Message: message})
+}