feat: support charge for user

backend/app/http/admin/users.go

@@ -41,3 +41,16 @@ func (ctl *users) Show(ctx fiber.Ctx, id int64) (*model.Users, error) {
 func (ctl *users) Articles(ctx fiber.Ctx, id int64, pagination *requests.Pagination) (*requests.Pager, error) {
 	return models.Posts.Bought(ctx.Context(), id, pagination)
 }
+
+type UserBalance struct {
+	Balance int64 `json:"balance"`
+}
+
+// Balance
+//
+//	@Router	/admin/users/:id/balance [post]
+//	@Bind	id path
+//	@Bind	balance body
+func (ctl *users) Balance(ctx fiber.Ctx, id int64, balance *UserBalance) error {
+	return models.Users.AddBalance(ctx.Context(), id, balance.Balance)
+}