Oauth2SessionManager.get_access_tokens returns invalid_grant

Hello, I have following code

def connect(self, event):
            qb_consumer_key=xxxxxxx
            qb_consumer_secret=xxxxxxxxx
            sandbox=True
            base_url='https://quickbooks.api.intuit.com'
            session_manager = Oauth2SessionManager(sandbox=sandbox,
                                                   client_id=qb_consumer_key,
                                                   client_secret=qb_consumer_secret,
                                                   base_url=base_url)
            state_id = str(uuid.uuid4())
            authorize_url = session_manager.get_authorize_url(callback_url,state=state_id)
            state = {
                    "client_id":qb_consumer_key,
                    "client_secret":qb_consumer_secret,
                    "sandbox": sandbox,
                    "base_url":base_url
                    }
            set_state(state_id, state) # stores the state data in cache
            return authorize_url

def callback(event):
            state = get_state(event['state']) #returns the state where state_id == event['state']
            if state:
                auth_code = event.get("code")
                realm_id = event.get("realmId")
                if auth_code:
                    session_manager = Oauth2SessionManager(**state)
                    at = session_manager.get_access_tokens(auth_code)
                    access_token = session_manager.access_token
                    print("access_token", access_token)

Its returning {“error”:“invalid_grant”} It could be due to different session_manager objects??

I looked through auth.py, with Oauth1SessionManager we can retrive previous session but I dont see similar option for Oauth2SessionManager.

[deoresheetal]

@cstarner Finally done, need to set session_manager.company_id=realm_id before accessing get_access_token as I was not initializing Quickbook client object.

[deoresheetal]

any suggestions on this? please guide as I am stuck on this.