Refactor useraccounts service for improved structure and asynchronicity

[vsun757]

No description provided.

[sonarqubecloud]

Quality Gate failed

Failed conditions
29.7% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: 165 lines in your changes are missing coverage. Please review.

Comparison is base (311bfba) 69.46% compared to head (ca9e552) 70.20%.
Report is 1 commits behind head on project-orion.

Files	Patch %	Lines
app/services/user-accounts-service.js	60.20%	76 Missing ⚠️
app/repository/user-accounts-repository.js	60.40%	59 Missing ⚠️
app/controllers/user-accounts-controller.js	47.27%	29 Missing ⚠️
app/services/teams-service.js	66.66%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           project-orion     #344      +/-   ##
=================================================
+ Coverage          69.46%   70.20%   +0.74%     
=================================================
  Files                150      150              
  Lines              14496    14393     -103     
  Branches            1665     1671       +6     
=================================================
+ Hits               10069    10105      +36     
+ Misses              4416     4278     -138     
+ Partials              11       10       -1     

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