clean up catch error

flaskapp/app.py

@@ -43,7 +43,7 @@ class ProtectedView(Resource):
                 assert(realm == config('REALM_ALLOWED'))
                 code = check_otp(user, realm, token)
                 assert(code == 200)
-            except KeyError or AssertionError:
+            except (KeyError, AssertionError) as e:
                 response = app.response_class(response=json.dumps({'Message': 'Invalid data'}),
                                               status=400,
                                               mimetype='application/json')
@@ -63,4 +63,4 @@ api.add_resource(MainView, '/')
 api.add_resource(ProtectedView, '/protected')
 
 if __name__ == '__main__':
-    app.run()
+    app.run(host='::')