[nits] fix docs to lowerCamelCase and add t.Parallel()

[t-kikuc]

What this PR does / why we need it:

• [docs] Fix field names to lowerCamelCase. Support OIDC for the SSO #5008 (comment)
• [nits] add t.Parallel() to a test case. Support OIDC for the SSO #5008 (comment)

Which issue(s) this PR fixes:

Related to #5008

Does this PR introduce a user-facing change?: No

• How are users affected by this change: N/A
• Is this breaking change: no
• How to migrate (if breaking change): N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.89%. Comparing base (a61c397) to head (f6c8a63).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5173      +/-   ##
==========================================
- Coverage   22.90%   22.89%   -0.01%     
==========================================
  Files         416      416              
  Lines       44598    44598              
==========================================
- Hits        10216    10212       -4     
- Misses      33592    33595       +3     
- Partials      790      791       +1     

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[khanhtc1202]

Nice catch 👍

[Warashi]

🚀