test.py

import firebase_admin
from firebase_admin import credentials, messaging

cred = credentials.Certificate("/Users/greg/Downloads/chefclub-notifications-test-1-firebase-adminsdk-0qqbs-7cb7b7b6c4.json")
firebase_admin.initialize_app(cred)

# This registration token comes from the client FCM SDKs.
registration_token = 'cjNg-fBsWsE:APA91bEc-pDmnfkyczdJroTv-KNHpucA7WhYrmxWrgcSz4HHqn5vhodglqI3mqUSZnz0_VhuJjCrvGUVyqbRR-YnP8DuxdeHQyp1BUiF-H2V2ockNJ2OO-yEh6Im2EFhI6KHUd3ettEg'

# See documentation on defining a message payload.
message = messaging.Message(
    data={
        'score': '850',
        'time': '2:45',
    },
    token=registration_token,
)

# Send a message to the device corresponding to the provided
# registration token.
response = messaging.send(message)
 
# Response is a message ID string.
print('Successfully sent message:', response)