✅ Test connect_instance_new for anonymous

[Koncopd]

And add fallback for db user.

[github-actions]

🚀 Deployed on https://66e091bed83e7a99e19f8834--lamindb-setup-htry.netlify.app

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 83.47%. Comparing base (b3f1706) to head (810ea61).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
lamindb_setup/core/_hub_core.py	42.85%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #850      +/-   ##
==========================================
- Coverage   83.56%   83.47%   -0.09%     
==========================================
  Files          43       43              
  Lines        3346     3352       +6     
==========================================
+ Hits         2796     2798       +2     
- Misses        550      554       +4     

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