Urllib to read response for internal service level call

Question

My use case is to login to webapp and then hit internal network call and parse response to validate using Python 3.9

Sudo code : login to web app. : Used selenium webdriver to login. hit internal endpt using urllib, this needs login credential hence I have used

    password_mgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()

    # Add the username and password.
    # If we knew the realm, we could use it instead of None.
    top_level_url = url
    password_mgr.add_password(None, top_level_url, username, password)

    handler = urllib.request.HTTPBasicAuthHandler(password_mgr)

    # create "opener" (OpenerDirector instance)
    opener = urllib.request.build_opener(handler)

    # use the opener to fetch a URL
    opener.open(api_endpt)

    # Install the opener.
    # Now all calls to urllib.request.urlopen use our opener.
    response = urllib.request.install_opener(opener)
    print(response)```


***but call fails at opener.open(api_endpt) step with :*** 
** @_sslcopydoc
    def do_handshake(self, block=False):
        self._check_connected()
        timeout = self.gettimeout()
        try:
            if timeout == 0.0 and block:
                self.settimeout(None)
>           self._sslobj.do_handshake()
E           ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129)

/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/ssl.py:1309: SSLCertVerificationError

During handling of the above exception, another exception occurred:**


Any further direction to parse response would be appreciated.