Remove basic authentication

[marceloFA]

Closes #240

[jacobtomlinson]

Thanks for taking the time to contribute this change. I expect we should see coverage increase because we didn't have any tests for user/pass auth.

I left a couple of comments. Also please be sure to run pre-commit to check the linting.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (530c5c4) 94.58% compared to head (0eeea80) 94.70%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
kr8s/_auth.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #260      +/-   ##
==========================================
+ Coverage   94.58%   94.70%   +0.12%     
==========================================
  Files          27       27              
  Lines        2751     2739      -12     
==========================================
- Hits         2602     2594       -8     
+ Misses        149      145       -4     

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[jacobtomlinson]

Many thanks!