empty -m flag will use azure

[Mohannadcse]

The assumption here azure is the default config to access openai, not openai itself.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.92%. Comparing base (d4f5d3f) to head (fab88cf).
Report is 2 commits behind head on main.

❗ Current head fab88cf differs from pull request most recent head 4878d68. Consider uploading reports for the commit 4878d68 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #468   +/-   ##
=======================================
  Coverage   70.92%   70.92%           
=======================================
  Files          91       91           
  Lines        8218     8218           
=======================================
  Hits         5829     5829           
  Misses       2389     2389           

Flag	Coverage Δ
unittests	70.92% <ø> (ø)

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