apply additionalQueryAPrameters everywhere

Author: toto

Sources/OAuth2Client/NXOAuth2Account.m

@@ -81,7 +81,8 @@ - (NXOAuth2Client *)oauthClient;
             NSURL *authorizeURL = [configuration objectForKey:kNXOAuth2AccountStoreConfigurationAuthorizeURL];
             NSURL *tokenURL = [configuration objectForKey:kNXOAuth2AccountStoreConfigurationTokenURL];
             NSString *tokenType = [configuration objectForKey:kNXOAuth2AccountStoreConfigurationTokenType];
-            
+            NSDictionary *additionalQueryParams = [configuration objectForKey:kNXOAuth2AccountStoreConfigurationAdditionalAuthenticationParameters];
+
             oauthClient = [[NXOAuth2Client alloc] initWithClientID:clientID
                                                       clientSecret:clientSecret
                                                       authorizeURL:authorizeURL
@@ -90,6 +91,10 @@ - (NXOAuth2Client *)oauthClient;
                                                          tokenType:tokenType
                                                         persistent:NO
                                                           delegate:self];
+            if (additionalQueryParams) {
+                oauthClient.additionalAuthenticationParameters = additionalQueryParams;
+            }
+            
         }
     }
     return oauthClient;

Sources/OAuth2Client/NXOAuth2Client.m

@@ -321,6 +321,11 @@ - (void)requestTokenWithAuthGrant:(NSString *)authGrant redirectURL:(NSURL *)red
     if (self.desiredScope) {
         [parameters setObject:[[self.desiredScope allObjects] componentsJoinedByString:@" "] forKey:@"scope"];
     }
+    
+    if (self.additionalAuthenticationParameters) {
+        [parameters addEntriesFromDictionary:self.additionalAuthenticationParameters];
+    }
+    
     authConnection = [[NXOAuth2Connection alloc] initWithRequest:tokenRequest
                                                requestParameters:parameters
                                                      oauthClient:self