test: Improve ParseUser::become test

[dplewis]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Closes: #478

Approach

Creates User in the cloud and become user on the client side.

TODOs before merging

• Add tests

[parse-github-assistant]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (a269f9e) 98.48% compared to head (d0fa843) 98.48%.

❗ Current head d0fa843 differs from pull request most recent head 3be590c. Consider uploading reports for the commit 3be590c to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #507   +/-   ##
=========================================
  Coverage     98.48%   98.48%           
  Complexity     1060     1060           
=========================================
  Files            38       38           
  Lines          3225     3225           
=========================================
  Hits           3176     3176           
  Misses           49       49           

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[mtrezza]

Looks good! Ready for merge?

[dplewis]

This is ready to merge

[parseplatformorg]

🎉 This change has been released in version 2.2.0