fix parsing user after social login (#49)

* fix parsing user after social login - closes #12953

* disallow using social login methods in synchronous way

* add stayLoggedIn param to wrapAsync

Author: Stanislav

libs/backendless.js

@@ -1826,8 +1826,12 @@
         },
 
         _loginSocial: function(socialType, fieldsMapping, permissions, async, container, stayLoggedIn) {
+            if (!async) {
+                throw new Error('Social login can not be called as synchronous method')
+            }
+
             var socialContainer = new this._socialContainer(socialType, container);
-            async = async && this._wrapAsync(async);
+            async = this._wrapAsync(async, stayLoggedIn);
 
             Utils.addEvent('message', window, function(e) {
                 if (e.origin == Backendless.serverURL) {
@@ -1836,9 +1840,7 @@
                     if (result.fault) {
                         async.fault(result.fault);
                     } else {
-                        Backendless.LocalCache.set("stayLoggedIn", !!stayLoggedIn);
-                        currentUser = this.Backendless.UserService._parseResponse(result);
-                        async.success(this.Backendless.UserService._getUserFromResponse(currentUser));
+                        async.success(result);
                     }
 
                     Utils.removeEvent('message', window);