Specify AWS Permissions if reading from S3

[dask-contrib]

Specify AWS Permissions if reading from S3

[mrocklin]

This works in arrow

import boto3 
from pyarrow.fs import S3FileSystem

session = boto3.session.Session()
credentials = session.get_credentials()

fs = S3FileSystem(
             secret_key=credentials.secret_key,
             access_key=credentials.access_key,
             region="us-west-2",
             session_token=credentials.token,
         )

This seems to work in dask-deltalake

import dask_deltatable as ddt
import boto3 

session = boto3.session.Session()
credentials = session.get_credentials()

df = ddt.read_deltalake(
    "s3://openscapes-scratch/etl-github/commit", 
    delta_storage_options=dict(
             AWS_SECRET_ACCESS_KEY=credentials.secret_key,
             AWS_ACCESS_KEY_ID=credentials.access_key,
             AWS_REGION="us-west-2",
             AWS_SESSION_TOKEN=credentials.token,
    )
)