diff --git a/lib/auth.js b/lib/auth.js
index 087937b..2915de1 100644
--- a/lib/auth.js
+++ b/lib/auth.js
@@ -14,29 +14,44 @@ var models = require("./models");
 
 function callback(accessToken, refreshToken, profile, done) {
     //logger.info(profile.displayName || profile.username);
+    var stringifiedProfile = JSON.stringify(profile);
     models.User.findOrCreate({
         where: {
             profileid: profile.id.toString()
         },
         defaults: {
-            profile: JSON.stringify(profile),
+            profile: stringifiedProfile,
             accessToken: accessToken,
             refreshToken: refreshToken
         }
     }).spread(function (user, created) {
         if (user) {
-            if (user.accessToken == accessToken) {
+            var needSave = false;
+            if (user.profile != stringifiedProfile) {
+                user.profile = stringifiedProfile;
+                needSave = true;
+            }
+            if (user.accessToken != accessToken) {
+                user.accessToken = accessToken;
+                needSave = true;
+                
+            }
+            if (user.refreshToken != refreshToken) {
+                user.refreshToken = refreshToken;
+                needSave = true;
+                
+            }
+            if (needSave) {
+                user.save().then(function () {
+                    if (config.debug)
+                        logger.info('user login: ' + user.id);
+                    return done(null, user);
+                });
+            } else {
                 if (config.debug)
                     logger.info('user login: ' + user.id);
                 return done(null, user);
             }
-            user.accessToken = accessToken;
-            user.refreshToken = refreshToken;
-            user.save().then(function () {
-                if (config.debug)
-                    logger.info('user login: ' + user.id);
-                return done(null, user);
-            })
         }
     }).catch(function (err) {
         logger.error('auth callback failed: ' + err);