Auth test speedup

[ZohebShaikh]

closes #758
The execution time for test_poll_for_token_timeout was reduced successfully:

pytest tests/unit_tests/service/test_authentication.py::test_poll_for_token_timeout  
# Before: 2s
# After: 0.25s  

Overall Suite Performance (Main vs. Branch)

Environment	Main	Optimized Branch	Delta
Python 3.10	13.39s (295 passed, 1 skipped)	11.36s (295 passed, 1 skipped)	-2.03s (-15.2%)
Python 3.11	14.99s (295 passed, 1 skipped)	13.17s (295 passed, 1 skipped)	-1.82s (-12.1%)
Python 3.12	21.16s (295 passed, 1 skipped)	18.17s (295 passed, 1 skipped)	-2.99s (-14.1%)
Dev Environment	15.73s (296 passed)	13.08s (296 passed)	-2.65s (-16.8%)

The results from the main branch are from this action

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.92%. Comparing base (13c6a59) to head (ef2fd3a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #762   +/-   ##
=======================================
  Coverage   92.92%   92.92%           
=======================================
  Files          37       37           
  Lines        2063     2063           
=======================================
  Hits         1917     1917           
  Misses        146      146           

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[callumforrester]

LGTM, thanks