Need assistance setting up Gmail oAuth about calibre-web

[jasehigh]

I have made some progress with this.
I have added the following into my docker compose file to expose the gmail.json file to calibre-web

    volumes:
      - type: bind
        source: /Volumes/data/docker/appdata/calibre-web/gmail.json
        target: /app/calibre-web/gmail.json

From the console to my docker container I perform the following:

ps -C "python3 /app/calibre-web/cps.py" -o pid=

This returns the PID that I then use in this command:

kill <pid> && python3 /app/calibre-web/cps.py

I then go back to calibre-web, and then have to login as the default "admin" user, as my user profile/settings have been removed. I select a the folder that contains my calibre database, and then click on the "Setup gmail account as email server" option.

I copy the URL from the docker console, paste this into my browser, and grant google access.
Using the URL this gives me, I paste this into another docker console to my container:

curl "<URL>"

This returns the message "The authentication flow has completed. You may close this window.".

The calibre-web window also shows:

"Success! Gmail Account Verified."
"Email Server Settings updated"

I then stop the container and restart. This allows me to log back in as my user.
However, once logged back in, the email option is not set to gmail.

Any assistance is greatly appreciated.