anchor.diff:  
           {
               "code" : "Unauthorized",
  -            "message" : "optional short error message", 
  +            "message" : "the gamer token is no longer available, call signin!", 
               "data" : "optional error data", 
           }        
           
  
positive.code: ###### header description
  |Header Field|Description|Value|
  |---|---|---|
  |Authentication|string, require| Authentication : Basic **apptoken**
  
  ###### response description
  this request as the same response a the login request!
  
  + Request (application/json)
  
  
negative.code: ###### response description
  |Field|Description|Value|
  |---|---|---|
  |gamerid|string| id related to the gamer for the current app, used by requests like postevent, addfriend, ... 
  |gamertoken|string| token used in basic authentication for gamer authenticate requests
  |profile|json| gamer's profile, including "name", "email", "nickname", ...
  |vfs|json| list of key/value associated to the app/game
  |gamervfs|json| list of key/value associated to the gamer
  |matches|json| array of match currently in open state of the gamer
  
  + Request (application/json)
  
  