Work light: WL.Server.setActiveUser - Unable to change - Invalid state: unable to change identifier

Question

I am trying to change the registered user ID,

var mydata="this is custom data array";

var user = JSON.parse(JSON.stringify(WL.Server.getActiveUser()));
           WL.Logger.debug("Before Update" + user.attributes);
           WL.Logger.debug(" displayName =" + user.displayName );
           WL.Logger.debug("isUserAuthenticated ="+ user.isUserAuthenticated );
           WL.Logger.debug("userId =" + user.userId );

          WL.Server.setActiveUser ("myAppRealm" ,{    userId: user.userId ,
               displayName: user.displayName,
               isUserAuthenticated: user.isUserAuthenticated,
               attributes: {  userdata: mydata   }
           } );
           WL.Logger.debug(" ---- Updateed user ---- "  );
           var user = JSON.parse(JSON.stringify(WL.Server.getActiveUser())); 

but it gives below exceptions .

response [/apps/services/api/myApp/common/query] success: /*-secure-
{"isSuccessful":false,"warnings":[],"errors":["Illegal State: Cannot change identity of an already logged in user in realm 'myAppRealm'. The application must logout first."],"responseID":"67","info":[]}*/ worklight.js:1097
Procedure invocation error. Illegal State: Cannot change identity of an already logged in user in realm 'myAppRealm'. The application must logout first. 

How can i change this?

Edit:

@Xv. Well, at that time I had a requirement to store some values ​​in a user session object. To do this, I first tried to modify the user object, as mentioned above, but then I found the APIs mentioned below that help in getting, changing, or adding values ​​to the session object.

WL 6.3 docs:

• MobileFirst Server Side API> JavaScript Server Side API> Classes> WL.Server

Access to the HttpServletRequest object.

• WL.Server.getClientRequest

HttpServletRequest, , JEE.

:

WL.Server.getClientRequest(). GetSession(). GetAttribute ( "MyKey" ) WL.Server.getClientRequest(). GetSession(). SetAttribute ( "mykey", myobj)

Answer 1

• realm getActiveUser API, . WL.Server.getActiveUser("myRealm")

• - , . , WL.Server.setActiveUser("myRealm", null), WL.Server.setActiveUser("myRealm", {...})