Added the ability to continue without a token

index.js

@@ -40,22 +40,24 @@ function ExpressOAuthServer(options) {
  */
 
 ExpressOAuthServer.prototype.authenticate = function(options) {
-  var that = this;
-
-  return function(req, res, next) {
-    var request = new Request(req);
-    var response = new Response(res);
+  const self = this;
+  options = options || {};
 
-    return Promise.bind(that)
+  return function(request, response, next) {
+    return Promise.bind(self)
       .then(function() {
-        return this.server.authenticate(request, response, options);
+        return this.server.authenticate(new Request(request), new Response(response), options);
       })
       .tap(function(token) {
-        res.locals.oauth = { token: token };
-        next();
+        request.oauth = { token: token };
+        return next();
       })
-      .catch(function(e) {
-        return handleError.call(this, e, req, res, null, next);
+      .catch(function(error) {
+        if (typeof options.catchErrorAndContinue !== 'undefined' && options.catchErrorAndContinue) {
+          return next();
+        } else {
+          return handleError.call(this, error, request, response, null, next);
+        }
       });
   };
 };