Disabling Billing on Google Cloud Using Google Clo

I am attempting to write a Google Cloud Function to set caps to disable usage above a certain limit. I followed the instructions here: https://cloud.google.com/billing/docs/how-to/notify#cap_disable_billing_to_stop_usage.

This is what my cloud function looks like (I am just copying and pasting from the Google Cloud docs page linked above):

import base64
import json
import os
from googleapiclient import discovery
from oauth2client.client import GoogleCredentials
PROJECT_ID = os.getenv('GCP_PROJECT')
PROJECT_NAME = f'projects/{PROJECT_ID}'
def stop_billing(data, context):
    pubsub_data = base64.b64decode(data['data']).decode('utf-8')
    pubsub_json = json.loads(pubsub_data)
    cost_amount = pubsub_json['costAmount']
    budget_amount = pubsub_json['budgetAmount']
    if cost_amount <= budget_amount:
        print(f'No action necessary. (Current cost: {cost_amount})')
        return

    billing = discovery.build(
        'cloudbilling',
        'v1',
        cache_discovery=False,
        credentials=GoogleCredentials.get_application_default()
    )

    projects = billing.projects()

    if __is_billing_enabled(PROJECT_NAME, projects):
        print(__disable_billing_for_project(PROJECT_NAME, projects))
    else:
        print('Billing already disabled')


def __is_billing_enabled(project_name, projects):
    """
    Determine whether billing is enabled for a project
    @param {string} project_name Name of project to check if billing is enabled
    @return {bool} Whether project has billing enabled or not
    """
    res = projects.getBillingInfo(name=project_name).execute()
    return res['billingEnabled']


def __disable_billing_for_project(project_name, projects):
    """
    Disable billing for a project by removing its billing account
    @param {string} project_name Name of project disable billing on
    @return {string} Text containing response from disabling billing
    """
    body = {'billingAccountName': ''}  # Disable billing
    res = projects.updateBillingInfo(name=project_name, body=body).execute()
    print(f'Billing disabled: {json.dumps(res)}')

Also attaching screenshot of what it looks like on Google Cloud Function UI:

I'm also attaching a screenshot to show that I copied and pasted the relevant things to the requirements.txt file as well.

But when I go to test the code, it gives me an error:

Expand all | Collapse all{
 insertId: "000000-69dce50a-e079-45ed-b949-a241c97fdfe4"  
 labels: {…}  
 logName: "projects/stanford-cs-231n/logs/cloudfunctions.googleapis.com%2Fcloud-functions"  
 receiveTimestamp: "2020-02-06T16:24:26.800908134Z"  
 resource: {…}  
 severity: "ERROR"  
 textPayload: "Traceback (most recent call last):
  File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 383, in run_background_function
    _function_handler.invoke_user_function(event_object)
  File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 217, in invoke_user_function
    return call_user_function(request_or_event)
  File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 214, in call_user_function
    event_context.Context(**request_or_event.context))
  File "/user_code/main.py", line 9, in stop_billing
    pubsub_data = base64.b64decode(data['data']).decode('utf-8')
KeyError: 'data'
"  
 timestamp: "2020-02-06T16:24:25.411Z"  
 trace: "projects/stanford-cs-231n/traces/8e106d5ab629141d5d91b6b68fb30c82"  
}

Any idea why?

Relevant Stack Overflow Post: https://stackoverflow.com/a/58673874/3507127