Testing Login of Laravel Passport without lose env

example.php

request()->request->add([
    'grant_type'    => 'password',
    'client_id'     => env('PASSPORT_CLIENT_ID'),
    'client_secret' => env('PASSPORT_CLIENT_SECRET'),
    'username'      => $this->username,
    'password'      => $this->password,
    'scope'         => '*',
]);

$request = Request::create(env('APP_URL') . '/oauth/token', 'POST');

return Route::dispatch($request);