Specify `file` for credentials and config.
Specify `file` for credentials and config.

About to add session stashing, so it’s helpful to specify which
credentials/config we’re stashing/restoring.
ee-in/python-api,plotly/plotly.py,plotly/plotly.py,plotly/python-api,ee-in/python-api,plotly/python-api,ee-in/python-api,plotly/python-api,plotly/plotly.py