lib/oauth.js
function tokenAuthErrorHandler(err,req,res,next) {
    var status;
    if(req.user && req.user._id) {
      status = 403;
    } else {
      status = 401;
    }
    console.error(err);
    if(err.stack) {
      console.error(err.stack);
      delete err.stack;
    }
    res.status(status).json(err);
  }
function tokenAuthErrorHandler(err,req,res,next) {
    var status;
    if(req.user && req.user._id) {
      status = 403;
    } else {
      status = 401;
    }
    console.error(err);
    if(err.stack) {
      console.error(err.stack);
      delete err.stack;
    }
    res.status(status).json(err);
  }
Handles errors if authentication from access_token provider fails