diff --git a/PNObject.podspec b/PNObject.podspec
index a56617b..e1eaa30 100644
--- a/PNObject.podspec
+++ b/PNObject.podspec
@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
 s.name             = "PNObject"
-s.version          = "0.3.1"
+s.version          = "0.3.2"
 s.summary          = "PNObject is a simple replica of the more complex ParseObject"
 
 # This description is used to generate tags and improve search results.
diff --git a/Pod/Classes/PNClasses/PNUser.h b/Pod/Classes/PNClasses/PNUser.h
index 33ab34f..72fddd2 100644
--- a/Pod/Classes/PNClasses/PNUser.h
+++ b/Pod/Classes/PNClasses/PNUser.h
@@ -29,6 +29,8 @@
  */
 - (void) logout;
 
+- (BOOL) isValidUser;
+
 //- (void) setPassword:(NSString * _Nonnull)password inBackGroundWithBlock:(nullable void (^)(BOOL saveStatus, id responseObject, NSError * error)) responseBlock;
 
 ///--------------------------------------
diff --git a/Pod/Classes/PNClasses/PNUser.m b/Pod/Classes/PNClasses/PNUser.m
index 139f2a9..f33fc0f 100644
--- a/Pod/Classes/PNClasses/PNUser.m
+++ b/Pod/Classes/PNClasses/PNUser.m
@@ -102,6 +102,14 @@ static bool isFirstAccess = YES;
     [self resetObject];
 }
 
+- (BOOL) isValidUser {
+    if(self.username && self.password && [self isValidPassword:[self password]]){
+        return YES;
+    }
+    
+    return NO;
+}
+
 #pragma mark PNObjectSubclassing Protocol 
 
 + (NSDictionary *)objcetMapping {
diff --git a/Pod/Classes/PNObjectConfig.m b/Pod/Classes/PNObjectConfig.m
index fa5d5d2..4222c18 100644
--- a/Pod/Classes/PNObjectConfig.m
+++ b/Pod/Classes/PNObjectConfig.m
@@ -1,10 +1,10 @@
-    //
-    //  PNObjectConfig.m
-    //  Pods
-    //
-    //  Created by Giuseppe Nucifora on 08/01/16.
-    //
-    //
+//
+//  PNObjectConfig.m
+//  Pods
+//
+//  Created by Giuseppe Nucifora on 08/01/16.
+//
+//
 
 #import "PNObjectConfig.h"
 #import "PNObjectConstants.h"
@@ -224,7 +224,7 @@ static bool isFirstAccess = YES;
 }
 
 - (void) tryRefreshToken {
-    if ([PNUser currentUser]) {
+    if ([PNUser currentUser] && [[PNUser currentUser] isValidUser]) {
         [_manager authenticateUsingOAuthWithURLString:[_currentEndPointBaseUrl stringByAppendingString:@"oauth-token"] username:[[PNUser currentUser] username] password:[[PNUser currentUser] password] scope:nil success:^(AFOAuthCredential * _Nonnull credential) {
             _currentOauthCredential = credential;
             [_manager.requestSerializer setAuthorizationHeaderFieldWithCredential:_currentOauthCredential];
diff --git a/Pod/Classes/Vendors/AFOAuth2Manager/AFOAuth2Manager.h b/Pod/Classes/Vendors/AFOAuth2Manager/AFOAuth2Manager.h
index 9b03e45..83e1ea9 100644
--- a/Pod/Classes/Vendors/AFOAuth2Manager/AFOAuth2Manager.h
+++ b/Pod/Classes/Vendors/AFOAuth2Manager/AFOAuth2Manager.h
@@ -1,38 +1,37 @@
-// AFOAuth2Manager.h
-//
-// Copyright (c) 2012-2014 AFNetworking (http://afnetworking.com)
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE
+    // AFOAuth2Manager.h
+    //
+    // Copyright (c) 2012-2014 AFNetworking (http://afnetworking.com)
+    //
+    // Permission is hereby granted, free of charge, to any person obtaining a copy
+    // of this software and associated documentation files (the "Software"), to deal
+    // in the Software without restriction, including without limitation the rights
+    // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    // copies of the Software, and to permit persons to whom the Software is
+    // furnished to do so, subject to the following conditions:
+    //
+    // The above copyright notice and this permission notice shall be included in
+    // all copies or substantial portions of the Software.
+    //
+    // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    // THE SOFTWARE
 
 #import <Foundation/Foundation.h>
+#import <AFNetworking/AFNetworking.h>
 #import "AFOAuthCredential.h"
 #import "AFHTTPRequestSerializer+OAuth2.h"
 
-@import AFNetworking;
-
 NS_ASSUME_NONNULL_BEGIN
 
 @interface AFOAuth2Manager : AFHTTPSessionManager
 
-///------------------------------------------
-/// @name Accessing OAuth 2 Client Properties
-///------------------------------------------
+    ///------------------------------------------
+    /// @name Accessing OAuth 2 Client Properties
+    ///------------------------------------------
 
 /**
  The service provider identifier used to store and retrieve OAuth credentials by `AFOAuthCredential`. Equivalent to the hostname of the client `baseURL`.
@@ -49,17 +48,17 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @property (nonatomic, assign) BOOL useHTTPBasicAuthentication;
 
-///------------------------------------------------
-/// @name Creating and Initializing OAuth 2 Managers
-///------------------------------------------------
+    ///------------------------------------------------
+    /// @name Creating and Initializing OAuth 2 Managers
+    ///------------------------------------------------
 
 /**
  Creates and initializes an `AFOAuth2Manager` object with the specified base URL, client identifier, and secret.
-
+ 
  @param url The base URL for the HTTP client. This argument must not be `nil`.
  @param clientID The client identifier issued by the authorization server, uniquely representing the registration information provided by the client. This argument must not be `nil`.
  @param secret The client secret.
-
+ 
  @return The newly-initialized OAuth 2 manager
  */
 + (instancetype)managerWithBaseURL:(NSURL *)url
@@ -73,11 +72,11 @@ NS_ASSUME_NONNULL_BEGIN
 
 /**
  Initializes an `AFOAuth2Manager` object with the specified base URL, client identifier, and secret. The communication to to the server will use HTTP basic auth by default (use `-(id)initWithBaseURL:clientID:secret:withBasicAuth:` to change this).
-
+ 
  @param url The base URL for the HTTP manager. This argument must not be `nil`.
  @param clientID The client identifier issued by the authorization server, uniquely representing the registration information provided by the client. This argument must not be `nil`.
  @param secret The client secret.
-
+ 
  @return The newly-initialized OAuth 2 client
  */
 - (id)initWithBaseURL:(NSURL *)url
@@ -89,13 +88,13 @@ NS_ASSUME_NONNULL_BEGIN
              clientID:(NSString *)clientID
                secret:(NSString *)secret;
 
-///---------------------
-/// @name Authenticating
-///---------------------
+    ///---------------------
+    /// @name Authenticating
+    ///---------------------
 
 /**
  Creates and enqueues an `NSURLSessionTask` to authenticate against the server using a specified username and password, with a designated scope.
-
+ 
  @param URLString The URL string used to create the request URL.
  @param username The username used for authentication
  @param password The password used for authentication
@@ -112,7 +111,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 /**
  Creates and enqueues an `NSURLSessionTask` to authenticate against the server with a designated scope.
-
+ 
  @param URLString The URL string used to create the request URL.
  @param scope The authorization scope
  @param success A block object to be executed when the request operation finishes successfully. This block has no return value and takes a single argument: the OAuth credential returned by the server.
@@ -151,7 +150,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 /**
  Creates and enqueues an `NSURLSessionTask` to authenticate against the server with the specified parameters.
-
+ 
  @param URLString The URL string used to create the request URL.
  @param parameters The parameters to be encoded and set in the request HTTP body.
  @param success A block object to be executed when the request operation finishes successfully. This block has no return value and takes a single argument: the OAuth credential returned by the server.
@@ -164,9 +163,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 @end
 
-///----------------
-/// @name Constants
-///----------------
+    ///----------------
+    /// @name Constants
+    ///----------------
 
 /**
  ## Error Domains