Cannot store or retreive documents from firestore via python

Question

I am trying to store a json document into firestore and am using firebase-admin package for python.

Whenever i run my file py firebase.py it just stucks and doesn't do anything and then request gets timedout

this is the code

import firebase_admin
from firebase_admin import credentials, firestore

cred = credentials.Certificate("fir-firebase-97d4b-firebase-adminsdk-uv2gq-e03ebce9ac.json")
firebase_admin.initialize_app(cred)
db = firestore.client()

ref = db.collection(u'demo').document(u'hello')
ref.set({
    'first': 'demo-name'
})

print('done')

python version is 3.8 firebase-admin version is 5.2.0