Firebase Admin Python SDK v2.9.0

Firebase Cloud Messaging

• A new firebase_admin.messaging
  module for sending messaging messages and managing topic subscriptions.
• A new send()
  function for sending messaging messages.
• A new subscribe_to_topic()
  function for subscribing a list of device registration tokens to a
  messaging topic.
• A new unsubscribe_from_topic()
  function for unsubscribing a list of device registration tokens from a
  messaging topic.

Firebase Auth

• The verify_id_token()
  function now accepts an optional check_revoked parameter. When True, an
  additional check is performed to see whether the token has been revoked.
• A new revoke_refresh_tokens()
  function to invalidate all tokens issued to a user.
• A new tokens_valid_after_timestamp property has been added to the
  UserRecord
  class to indicate the time before which tokens are not valid.