Checking data from firestore

test.py

import firebase_admin
from firebase_admin import credentials, firestore

cred = credentials.Certificate("./ServiceAccountKey.json")
app = firebase_admin.initialize_app(cred)

store = firestore.client()
doc_ref = store.collection(u'COLLECTION_TO_CHECK')

data = []

docs = doc_ref.get()
for doc in docs:
    data.append(doc.to_dict())
print(len(data))