ldap.group_required doesn't work as decorator when listed in API from Flask-Restplus

[mittal-umang]

I came across this issue where the ldap.group_required doesn't work as decorator when it is listed in API which has a blueprint from flask-restplus.

from flask import Blueprint

from clients.routes import api as ns1
from configurations.custom_api import CustomAPI


class Blueprints:

    def __init__(self):
        pass

    @staticmethod
    def blueprint_swagger(ldap=None):
        blueprint = Blueprint('api', __name__, url_prefix='/api/v1')
        api = CustomAPI(blueprint,
                        title='Hello World',
                        version='1.0',
                        description='Random Description',
                        decorators=[ldap.group_required(groups=['GROUP1']), ldap.basic_auth_required])

        api.add_namespace(ns1)

        return blueprint

The CustomAPI Class is defined as follows:

from flask import url_for
from flask_restplus import Api


class CustomAPI(Api):
    @property
    def specs_url(self):
        """
        The Swagger specifications absolute url (ie. `swagger.json`)

        :rtype: str
        """
        return url_for(self.endpoint('specs'), _external=False)

the error i received while doing this is

Traceback (most recent call last):
  File "PATH/venv/lib/python3.7/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "PATH/venv/lib/python3.7/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "PATH/venv/lib/python3.7/site-packages/flask_simpleldap/__init__.py", line 321, in wrapped
    if g.user is None:
  File "PATH/venv/lib/python3.7/site-packages/werkzeug/local.py", line 348, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: '_AppCtxGlobals' object has no attribute 'user'

Would appreciate a quick response.