Where can i get client cert and key in Jira server for requesting rest api

I am working on embedding rest api from jira server to my python code. Using basic authentication but getting SSL certificate issue.
Where can I get client certificate and key? Or Is there any other way to get it.

Error:
'[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1108)')))