diff --git a/opt/opt.go b/opt/opt.go
new file mode 100644
index 0000000..eaf0a63
--- /dev/null
+++ b/opt/opt.go
@@ -0,0 +1,4 @@
+package opt
+
+type Config struct {
+}
diff --git a/resp/resp.go b/resp/resp.go
index a961dc6..f44db83 100644
--- a/resp/resp.go
+++ b/resp/resp.go
@@ -70,6 +70,7 @@ func _r(c *gin.Context, r *res, args ...any) {
 func R400(c *gin.Context, args ...any) {
 	r := &res{
 		Status: 400,
+		Code:   -1,
 	}
 
 	_r(c, r, args...)
@@ -78,6 +79,7 @@ func R400(c *gin.Context, args ...any) {
 func R401(c *gin.Context, args ...any) {
 	r := &res{
 		Status: 401,
+		Code:   -1,
 	}
 
 	_r(c, r, args...)
@@ -86,6 +88,7 @@ func R401(c *gin.Context, args ...any) {
 func R403(c *gin.Context, args ...any) {
 	r := &res{
 		Status: 403,
+		Code:   -1,
 	}
 
 	_r(c, r, args...)
@@ -94,6 +97,7 @@ func R403(c *gin.Context, args ...any) {
 func R500(c *gin.Context, args ...any) {
 	r := &res{
 		Status: 500,
+		Code:   -1,
 	}
 
 	_r(c, r, args...)
@@ -102,6 +106,7 @@ func R500(c *gin.Context, args ...any) {
 func R501(c *gin.Context, args ...any) {
 	r := &res{
 		Status: 501,
+		Code:   -1,
 	}
 
 	_r(c, r, args...)
diff --git a/tool/must.go b/tool/must.go
index 3b70062..20154a0 100644
--- a/tool/must.go
+++ b/tool/must.go
@@ -11,3 +11,8 @@ func Must(errs ...error) {
 		}
 	}
 }
+
+func MustWithData[T any](data T, err error) T {
+	Must(err)
+	return data
+}