Support access_token during login and reduce calls to auth store

[Bijnagte]

Description

I ran into an issue while trying to use the client against our internal registry since it uses a different (but allowed) token response field. As I was debugging I also noticed that the repeated calls to the auth store can actually reduce performance because it delegates to the binary locally multiple times so I just added a fix for that as well.

Testing done

I did not add tests at this point because the current behavior is not tested and I would prefer to make sure I can get the library to work before investing a lot of time in setting up complex testing using wiremock or refactoring significantly.

Submitter checklist

• I have read and understood the CONTRIBUTING guide
• I have run mvn license:update-file-header, mvn spotless:apply, pre-commit run -a, mvn clean install before opening the PR

[jonesbusy]

Thanks! Can you apply spotless formatting? It's currently failing the build