I will go ahead and reply to my one before someone beats me to it.  A better way would be to change this line: if (!StringUtils.hasText(value)) { return null; }  to: if (!StringUtils.hasText(value)) { return ""; }   

That almost works. There is one little problem though.  It sets  oauth_token=null, it needs to be oauth_token= You need to change: for (String key : args.keySet()) {     String arg = key+"="+encode(args.get(key));     argList.add(arg); }   to: for (String key : args.keySet()) ...

I have the same question.  Where do I find my opensocial_token?