def callback_path
	      @callback_path ||= begin
	        path = options[:callback_path] if options[:callback_path].is_a?(String)
	        path ||= current_path if options[:callback_path].respond_to?(:call) && options[:callback_path].call(env)
	        path ||= custom_path(:request_path)
	        path ||= Auth::OmniAuth::Path.common_callback_path(name)
	        path
	      end
	    end
def callback_path
	      @callback_path ||= begin
	        path = options[:callback_path] if options[:callback_path].is_a?(String)
	        path ||= current_path if options[:callback_path].respond_to?(:call) && options[:callback_path].call(env)
	        path ||= custom_path(:request_path)
	        path ||= Auth::OmniAuth::Path.common_callback_path(name)
	        path
	      end
	    end
modified to use Auth::OmniAuth::Path