Update to fix credential error

Author: auser

README.md

@@ -28,7 +28,7 @@ manager.configure({
 });
 
 // ...
-manager.authorize('google', {scopes: 'profile email'})
+manager.authorize('google', {scopes: 'profile,email'})
 .then(resp => console.log('Your users ID'))
 .catch(err => console.log('There was an error'));
 ```

android/src/main/java/io/fullstack/oauth/OAuthManagerProviders.java

@@ -60,9 +60,15 @@ private static OAuth10aService twitterService(final HashMap cfg, final String ca
           .apiSecret(consumerSecret)
           .debug();
 
+    String scopes = (String) cfg.get("scopes");
+    if (scopes != null) {
+      builder.scopes(scopes);
+    }
+
     if (callbackUrl != null) {
       builder.callback(callbackUrl);
     }
+    
     return builder.build(TwitterApi.instance());
   }
 

ios/OAuthManager/OAuthManager.m

@@ -499,20 +499,25 @@ - (NSDictionary *) credentialForAccount:(NSString *)providerName
         return nil;
     }
 
-    id credentials;
     NSString *version = [cfg valueForKey:@"auth_version"];
+    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
+    
     if ([version isEqualToString:@"1.0"]) {
-        credentials = [account credential];
+        DCTOAuth1Credential *credentials = [account credential];
+        
+        if (credentials && credentials.oauthToken) {
+            NSString *token = credentials.oauthToken;
+            [dict setObject:token forKey:@"access_token"];
+        }
     } else if ([version isEqualToString:@"2.0"]) {
-        credentials = [account credential];
-    } else {
-        return nil;
+        DCTOAuth2Credential *credentials = [account credential];
+        
+        if (credentials && credentials.accessToken) {
+            NSString *token = credentials.accessToken;
+            [dict setObject:token forKey:@"access_token"];
+        }
     }
 
-    NSDictionary *dict = @{
-                           @"access_token": [credentials accessToken]
-                           };
-    
     return dict;
 }