Little fixes

Those provides a better way to use this app in a broader configuration : 
- Usage of RememberMeToken doesn't break any of the functionalities
- A little more dangerous situation : `$app->get` while connecting controllers wouldn't allow a proper use of `$app->mount`. Migrating means using `$app->mount("/api/v1.0/", $oAuth);` where `$oAuth` is an instanceof `AuthBucketOAuth2ServiceProvider`