Error while working with Pagerduty incident acknowledge and other operations

Hi Team,

While i am using pagerduty plugin in st2 to acknowledge, resolve the incident i am getting an error like below.

As per what is asked in the plugin, i have provided api key, integration key and a valid Email with which i have user in pagerduty. Still i am not able to administer the triggers in pager duty and getting an above error. Can someone please help me out with this please?

st2.actions.python.PdAction: DEBUG    Initializing pypd client
st2.actions.python.PdAction: DEBUG    Checking if entity is defined: Incident
st2.actions.python.PdAction: DEBUG    Checking if method is defined: acknowledge
st2.actions.python.PdAction: DEBUG    Running an entity_id specific method
st2.actions.python.PdAction: DEBUG    Extracting entity_id from kwargs: PECMUVT
st2.actions.python.PdAction: DEBUG    running check_required(); inputs: {'entity_id': 'PECMUVT'}
st2.actions.python.PdAction: DEBUG    running a fetch() on Incident:PECMUVT
st2.actions.python.PdAction: DEBUG    Running pypd acknowledge on Incident:PECMUVT
Traceback (most recent call last):
  File "/opt/stackstorm/st2/lib/python3.6/site-packages/python_runner/python_action_wrapper.py", line 334, in <module>
    obj.run()
  File "/opt/stackstorm/st2/lib/python3.6/site-packages/python_runner/python_action_wrapper.py", line 193, in run
    output = action.run(**self._parameters)
  File "/opt/stackstorm/packs/pagerduty/actions/action.py", line 112, in run
    entity=entity, method=method, entity_id=entity_id, **kwargs))
  File "/opt/stackstorm/packs/pagerduty/actions/lib/base.py", line 173, in entity_id_method
    entity_id_method = getattr(source, method)(**kwargs)
  File "/opt/stackstorm/virtualenvs/pagerduty/lib/python3.6/site-packages/pypd/models/incident.py", line 64, in acknowledge
    data=data,)
  File "/opt/stackstorm/virtualenvs/pagerduty/lib/python3.6/site-packages/pypd/mixins.py", line 123, in request
    **kwargs
  File "/opt/stackstorm/virtualenvs/pagerduty/lib/python3.6/site-packages/pypd/mixins.py", line 72, in _do_request
    return self._handle_response(requests_method(*args, **kwargs))
  File "/opt/stackstorm/virtualenvs/pagerduty/lib/python3.6/site-packages/pypd/mixins.py", line 48, in _handle_response
    raise BadRequest(response.status_code, response.text)
pypd.errors.BadRequest: BadRequest (2010): Access Denied```

This happens to be related to user api key its working now.