fix: kbcli cluster connect use root credential

[shanshanying]

• fix [BUG] kbcli failed to connect cluster #66

[codecov-commenter]

Codecov Report

Attention: 20 lines in your changes are missing coverage. Please review.

Comparison is base (e4302b6) 43.10% compared to head (bb75582) 43.10%.
Report is 1 commits behind head on main.

❗ Current head bb75582 differs from pull request most recent head 4235295. Consider uploading reports for the commit 4235295 to get more accurate results

Files	Patch %	Lines
pkg/cmd/cluster/connect.go	0.00%	20 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #68      +/-   ##
==========================================
- Coverage   43.10%   43.10%   -0.01%     
==========================================
  Files         222      222              
  Lines       28360    28366       +6     
==========================================
+ Hits        12225    12227       +2     
- Misses      14625    14629       +4     
  Partials     1510     1510              

Flag	Coverage Δ
unittests	43.10% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.