Added fullstackreact#171

and my NSString *clientID fix, which might not be as good as
https://github.com/fullstackreact/react-native-oauth/blob/2f8c8d1483526bbc8a6ca72183c6d11a71538ad3/ios/OAuthManager/OAuthManager.m

Author: SailingSteve

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

@@ -7,6 +7,7 @@
 import android.util.Log;
 
 import com.google.gson.Gson;
+import com.google.gson.JsonSyntaxException;
 
 import com.facebook.react.bridge.Arguments;
 import com.facebook.react.bridge.Callback;
@@ -403,7 +404,25 @@ private WritableMap accessTokenResponse(
     Map accessTokenMap = new Gson().fromJson(accessToken.getRawResponse(), Map.class);
 
     Log.d(TAG, "Credential raw response: " + accessToken.getRawResponse());
-    
+
+    /* Some things return as JSON, some as x-www-form-urlencoded (querystring) */
+
+    Map accessTokenMap = null;
+    try {
+      accessTokenMap = new Gson().fromJson(accessToken.getRawResponse(), Map.class);
+    } catch (JsonSyntaxException e) {
+      /*
+      failed to parse as JSON, so turn it into a HashMap which looks like the one we'd
+      get back from the JSON parser, so the rest of the code continues unchanged.
+      */
+      Log.d(TAG, "Credential looks like a querystring; parsing as such");
+      accessTokenMap = new HashMap();
+      accessTokenMap.put("user_id", accessToken.getParameter("user_id"));
+      accessTokenMap.put("oauth_token_secret", accessToken.getParameter("oauth_token_secret"));
+      accessTokenMap.put("token_type", accessToken.getParameter("token_type"));
+    }
+
+
     resp.putString("status", "ok");
     resp.putBoolean("authorized", true);
     resp.putString("provider", providerName);

ios/OAuthManager/OAuthManager.m

@@ -304,6 +304,8 @@ - (NSDictionary *) getConfigForProvider:(NSString *)name
 
     DCTAuthAccount *existingAccount = [manager accountForProvider:providerName];
     NSString *clientID = ((DCTOAuth2Credential *) existingAccount).clientID;
+        NSString *clientID = ([providerName isEqualToString:@"google"]) ? ((DCTOAuth2Credential *) existingAccount).clientID : (NSString *)nil;
+
     if (([providerName isEqualToString:@"google"] && existingAccount && clientID != nil)
         || (![providerName isEqualToString:@"google"] && existingAccount != nil)) {
         if ([existingAccount isAuthorized]) {