I am trying to invoke the Blogger AP from a Google Cloud Function. I am 
referring to the docs here - 
https://cloud.google.com/docs/authentication/production#obtaining_credentials_on_compute_engine_kubernetes_engine_app_engine_flexible_environment_and_cloud_functions

The doc says that the default credentials are available in the Cloud 
Function. I am able to run the given example to get the list of buckets.

But when I call a sample code from the Blogger API with the same 
credentials it fails with "Encountered 403 Forbidden with reason 
"insufficientPermissions" error. 

Please help me identify why the first part of this code works and the 
second part fails.


def explicit_compute_engine():    from google.auth import compute_engine
    import googleapiclient.discovery
    #PART I
    credentials = compute_engine.Credentials()
    storage_client = googleapiclient.discovery.build(
        'storage', 'v1', credentials=credentials)
    print('before buckets')
    buckets = storage_client.buckets().list(project='<MY project Id here>').
execute()
    print(buckets)

    #PART II (fails)
    credentials = compute_engine.Credentials()
    blogger = googleapiclient.discovery.build(
        'blogger', 'v3', credentials=credentials)
    print(blogger)
    blogs = blogger.blogs()
    blog = blogs.get(blogId='<BLOG ID here>', maxPosts=2).execute()
    #Error "Encountered 403 Forbidden with reason "insufficientPermissions" 
here
    print(str(blog))


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  • [google-appengine] ... Shankar P S

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