Merge pull request #3 from gdong42/master

Add redirect_uri to access_token params

Author: erickguan

lib/auth/oauth_gems.rb

@@ -226,5 +226,10 @@ def authorize_params
       end
     end
   end
+
+  def callback_url
+    options[:redirect_uri] || (full_host + script_name + callback_path)
+  end
+
 end