Fetching Google Sheet data from locally mounted drive via gspread

I am working on a Google Colab notebook that requires the user to mount google drive using the colab.drive python library. They then input relative paths on the local directory tree (/content/drive/... by default on that mount) to files of interest for analysis. Now, I want to use a Google Sheet they can create as a configuration file. There is lots of info on how to authenticate gspread and fetch a sheet from its HTTPS url, but I can't find any info on how to access the .gsheet file using gspread that is already mounted on the local filesystem of the colab runtime.

There are many tutorials using this flow: https://colab.research.google.com/notebooks/io.ipynb#scrollTo=yjrZQUrt6kKj , but I don't want to make the user authenticate twice (having already done so for the initial mount), and i don't want to make them input some files as relative path, some as HTTPS URL.

I had thought this would be quite like using gspread to work with google sheets that I might have on my locally mounted drive as well. But, I haven't seen this workflow anywhere either. Any pointers in that direction might help me out as well.

Thank you!

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