some changes to auth and group api

api/__init__.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from flask import Blueprint
+from flask import Blueprint, abort
 from flask_restplus import Api, Namespace
 
 api_authorizations = {
@@ -40,3 +40,13 @@ from .example_api import *
 from .auth_api import *
 from .user_api import *
 from .group_api import *
+
+
+@api_bp.route('/<path:path>')
+def catch_all_api(path):
+    """
+    Default 404 response for undefined paths in API.
+    :param path:
+    :return:
+    """
+    abort(404)