How to submit session in API routes:

I want to submit a session at api. So at api.php, I did this:

Route::prefix('v1')->namespace('Apiv1')->group(function(){     
    Route::get('/test', function () {
        session()->put('user_phone_number', 'some value');
    });

    Route::get('/test2', function () {
        dd(session()->get('user_phone_number'));
    });
});

But results of dd(session()->get('user_phone_number')); is null somehow!

So the question is, how can I submit a session in Laravel API properly?