How to read binded model value to laravel route

I understood to bind model object to laravel route. But how to read the binded value to request in controller. furthur how can set controller and action for route once i use anonymous function.

Route::get('/{user_id}', function (App\Models\User $user) {
       // What to write here to return controll to usercontrollers profile action i.e. UserController@Profile... 
});

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