protected function registerModelContracts()
    {
        $this->app->bind(AdminUserInterface::class, AdminUserRepository::class);
        $this->app->bind(MenuInterface::class, MenuRepository::class);
        $this->app->bind(PageInterface::class, PageRepository::class);
        $this->app->bind(RoleInterface::class, RoleRepository::class);
        $this->app->bind(SiteCurrencyInterface::class, SiteCurrencyRepository::class);
    }