In Connexion Window :

+ added error management for :
         # invalid token format (check if none, too small or to big for the moment);
         # check if access token is null after trying to get it;
+ added a success message to be displayed upon successful authentication
+ added a failure message to be displayed upon failed authentication

In API Setuo :
+ added checkAuthStatus to check if the API properly authenticate the user
+ added a two more properties in properties files : user photo count and user id
* changed return type for beginAuth : return false if something went wrong or true if OK