Added fix for Header.Parse

header.go

@@ -17,8 +17,8 @@ func (h Header) Parse(data any) {
 		panic(fmt.Errorf("expected struct input for data"))
 	}
 	for i := 0; i < d.NumField(); i++ {
-		key := d.Type().Field(i).Tag.Get("header")
-		if key == "" {
+		key, ok := d.Type().Field(i).Tag.Lookup("header")
+		if !ok || key == "" {
 			continue
 		}
 		v := make([]string, 0)
@@ -32,11 +32,12 @@ func (h Header) Parse(data any) {
 				if item.Kind() == reflect.Pointer || item.Kind() == reflect.Interface {
 					item = item.Elem()
 				}
-				v = append(v, fmt.Sprint(item.Interface()))
+				v = append(v, fmt.Sprintf("%s", item.Interface()))
 			}
 		} else {
-			v = append(v, fmt.Sprint(val.Interface()))
+			v = append(v, fmt.Sprintf("%s", val.Interface()))
 		}
+		h[key] = v
 	}
 }