refactor and fix comments

[ashish-amarnath]

Release note:

[netlify]

✅ Deploy Preview for pinniped-dev canceled.

Name	Link
🔨 Latest commit	ab2c2e3
🔍 Latest deploy log	https://app.netlify.com/sites/pinniped-dev/deploys/66ec8bcf9d94f50008f8b818

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 31.14%. Comparing base (65b93f0) to head (ab2c2e3).

Files with missing lines	Patch %	Lines
internal/upstreamldap/upstreamldap.go	85.71%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2061   +/-   ##
=======================================
  Coverage   31.13%   31.14%           
=======================================
  Files         368      368           
  Lines       60970    60971    +1     
=======================================
+ Hits        18985    18988    +3     
+ Misses      41461    41458    -3     
- Partials      524      525    +1     

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