anchor.diff:          {
               "code" : "Unauthorized",
               "message" : "the gamer token is no longer available, call signin!", 
  -            "data" : "optional error data", 
  +            "data" : "optional error data"
           }
   
   ### logout [DELETE]
  
positive.code:         {
              "code" : "Unauthorized",
              "message" : "optional short error message", 
              "data" : "optional error data", 
          }
  
  ### login [GET]
  
negative.code: + Response 200 (application/json)
  
          {
              "gamerid" : "identifier of the user" ,
              "gamertoken" : "reusable token used by gamer related requests" ,
              "profile" : {},
              "vfs" : {},
              "gamervfs" : {},
  