Dominate vue router with Laravel router

I am building an application with Laravel and Vue.js. I am using vue router. With this I am controlling all routes. Now, I want to make an url xyz.com/admin which will different (Laravel new route, I want to work with this admin separately). I am using this but not working.

Route::get('/admin/{all}', 'AdminController@index')->where(['all' => '.*']);

via Chebli Mohamed