Cleanup AuthStore

[jonesbusy]

Description

Unused methods. There is not "login" on SDK level. In environment without docker/podman username/password auth can be used

Testing done

CI

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.00%. Comparing base (479a300) to head (cd33258).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #201      +/-   ##
============================================
- Coverage     85.14%   85.00%   -0.14%     
+ Complexity      380      374       -6     
============================================
  Files            31       31              
  Lines          1286     1274      -12     
  Branches        141      141              
============================================
- Hits           1095     1083      -12     
+ Misses          126      124       -2     
- Partials         65       67       +2     

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