Target class [UserCheck] does not exist. in laravel code example

Example 1: laravel target class does not exist

Uncomment this line in app>>provider>>RouteServiceProvider.php file
// protected $namespace = 'App\\Http\\Controllers';

Example 2: Target class [PlayerController] does not exist.

//add controller path
Route::get('/players', 'App\Http\Controllers\PlayerController@index');