fix: change user attribute to JSONObject

[zhu-xiaowei]

• PR title and description conform to Pull Request guidelines.

Description of changes:

1. change user attribute to JSONObject

How did you test these changes?
(Please add a line here how the changes were tested)

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (88037a0) 87.17% compared to head (5e45dfa) 87.17%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #50   +/-   ##
=========================================
  Coverage     87.17%   87.17%           
  Complexity      447      447           
=========================================
  Files            42       42           
  Lines          1638     1638           
  Branches        149      149           
=========================================
  Hits           1428     1428           
  Misses          133      133           
  Partials         77       77           

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