get all files in drive via REST API

Question

I'm trying to access all my files in my drive via the endpoint

/me/drive/root/children

However it returns 0 children even though the following observations happen:

1. Calling /me/drive/root returns:

   ","folder":{"childCount":3},"root":{},"size":28413,"specialFolder":{"name":"documents"}}

2. More interestingly, doing the API call from the Graph Explorer: https://graph.microsoft.io/en-us/graph-explorer does show the 3 files that I have when using me/drive/root/children.

3. The graph explorer matches perfectly the API call when using /me/drive/root, but not /me/drive/root/children.

What is happening?

EDIT:

Following Brad suggestion I decoded the token with https://jwt.io/ and the parameters scp reads:

scp": "Mail.Send User.Read",

Second edit:

I removed all the app permissions from apps.dev.microsoft.com and I still have the same observations. It's looks like the permissions I set there have no effect.

Answer 1

The code above follows the example found at:

https://dev.office.com/code-samples-detail/5989

As it turns out, the whole confusing was coming from here:

microsoft = oauth.remote_app(
    'microsoft',
    consumer_key=client_id,
        consumer_secret=client_secret,
        request_token_params={'scope': 'User.Read Mail.Send Files.Read Files.ReadWrite'},
        base_url='https://graph.microsoft.com/v1.0/',
        request_token_url=None,
        access_token_method='POST',
        access_token_url='https://login.microsoftonline.com/common/oauth2/v2.0/token',
        authorize_url='https://login.microsoftonline.com/common/oauth2/v2.0/authorize'
)

I did not have the right scopes declared in request_token_params. So even if the app has the permissions, without the scopes declared there you cannot access the sheets.