如何在laravel 5.8中更改默认api路由路径

Question

我只想将api的路由路径更改为route / api.php到route / Routes / api.routes.php

这是RouteServiceProvider.php

class RouteServiceProvider extends ServiceProvider
{
    /**
     * This namespace is applied to your controller routes.
     *
     * In addition, it is set as the URL generator's root namespace.
     *
     * @var string
     */
    protected $namespace = 'App\Http\Controllers';

    /**
     * Define your route model bindings, pattern filters, etc.
     *
     * @return void
     */
    public function boot()
    {
        //

        parent::boot();
    }

    /**
     * Define the routes for the application.
     *
     * @return void
     */
    public function map()
    {
        $this->mapApiRoutes();

        $this->mapWebRoutes();
        $this->mapProjectApiRoutes();


        //
    }

    /**
     * Define the "web" routes for the application.
     *
     * These routes all receive session state, CSRF protection, etc.
     *
     * @return void
     */

    protected function mapProjectApiRoutes(){
        Route::prefix('api')
            ->middleware(['api', 'RequestEncrypt', 'ApiKey'])
            ->namespace('App\Http\Controllers\Api')
            ->group(base_path('routes/Routes/api.routes.php'));
    }
    protected function mapWebRoutes()
    {
        Route::middleware('web')
             ->namespace($this->namespace)
             ->group(base_path('routes/web.php'));
    }

    /**
     * Define the "api" routes for the application.
     *
     * These routes are typically stateless.
     *
     * @return void
     */
    protected function mapApiRoutes()
    {
        Route::prefix('api')
             ->middleware('api')
             ->namespace($this->namespace)
             ->group(base_path('routes/api.php'));
    }
}

这就是我在RouteServiceProvider.php中所做的

请检查下面的图片我遇到此错误

我正在使用laravel 5.8 请帮忙。