RK-J

Admin UI:
In the UI, File attach is currently present.
Create a 'Ingest book from Drive' switch below the "File" option,
If you want to provide the fileUrl(url of the file present in the drive) instead of file attach,
enable the 'Ingest book from Drive' switch, text box for the "Drive Link for Book" and the Access Token will be showed,
disable the 'Ingest book from Drive' switch, text box for the "Drive Link for Book" and the Access Token will not be showed,

BE:
If the fileUrl and Access token is present,
get the book from the drive based on the fileUrl and Access token
Otherwise
process the book provided in the request.