Answers for "how to add namespace in laravel route service"

laravel route namespace and prefix

Route::prefix('admin')->group(function () {
    Route::get('/users', function () {
        // Matches The "/admin/users" URL
    });
});

laravel 8 routes namespace

Route::group(['namespace' => 'App\Http\Controllers', 'prefix' => 'admin',
 'as' => 'admin.', 'middleware' => ['auth:sanctum', 'verified']], function()
{
    Route::get('/dashboard', ['DashboardController', 'index']);
});