Comment 75 for bug 1844453

This from Google drive support in response to me asking them how to gain access;

Currently, Google Drive does not have a feature where you can set a pin or password to a certain files. Google Drive only saved the files the way we created it. If you forgot the password on the file you want to access you need to contact the program developer who created the apps or program you used prior saving it to Google Drive.

Since you are trying to unlock Libre Office documents, you need to reach their support for further assistance.

    Libre Office Community Support
    Libre Office Professional Support

When you contact Libre Office Support, please let them know that you need help with the 6 digit PIN so that it will allow remote access from your Libre Office account.

Where does the 6 digit pin originate?

I imagine even if LO fixes the issue then "newer" LO users who haven't previously availed themselves of the service simply won't have a 6 Digit PIN.

That's certainly my situation. I'm not trying to access existing files, just trying to implement the cloud storage for some CALCs by File> Open Remote> Add Service (from the dropdown menu defaulting to Manage services.