updated method "/api/v3/botx/users/users_as_csv"

[mikhailopryshko]

PR checklist

• I've written good commit message for all commits
• I've split changes into separate commits where it's appropriate
• I've added the description of function to documentation
• I've updated project version in pyproject.toml
• I'll make a release when PR is merged
• I'll bump pybotx in bot-template

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c307cb8) to head (3432e26).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #551   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          135       135           
  Lines         5089      5097    +8     
  Branches       214       214           
=========================================
+ Hits          5089      5097    +8     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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