Accessing private maven repo using default GitHub configuration

**Description of the issue**

We've been using the advanced configuration option for GitHub for awhile now with no issues. With all of the improvements made to the default configuration option, I wanted to experiment with it to simplify management of our CodeQL configuration. I switched from advanced to default and created a branch that eliminated our CodeQL workflow and configuration file to test it out.

The default CodeQL check triggered and appears to have scanned the code successfully. However, when I view the results under `Security | Code scanning | Tools | CodeQL (Default setup) | View configuration`, warnings appear that CodeQL was unable to extract dependency information from gradle.


After further investigation this appears to be caused by the fact that our project uses a private maven repo for retrieving dependencies and the CodeQL workflow does not have access to these credentials. Is there a way to fix this or is my only option to stick with the advanced configuration? If the latter, any chance support for this might be added?