[PasswordResetRequest] Eliminate info leak

[imnasnainaec]

Resolves #2406

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This change is 

[jasonleenaylor]

Reviewed 5 of 5 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)

[codecov-commenter]

Codecov Report

Patch coverage: 60.00% and project coverage change: +0.21 🎉

Comparison is base (dcefdb1) 65.76% compared to head (c2c1c12) 65.97%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2410      +/-   ##
==========================================
+ Coverage   65.76%   65.97%   +0.21%     
==========================================
  Files         239      239              
  Lines        8223     8215       -8     
  Branches      504      502       -2     
==========================================
+ Hits         5408     5420      +12     
+ Misses       2457     2439      -18     
+ Partials      358      356       -2     

Flag	Coverage Δ
backend	77.91% <0.00%> (-0.07%)	⬇️
frontend	52.14% <66.66%> (+0.50%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
Backend/Controllers/UserController.cs	46.09% <0.00%> (ø)
...rc/components/Login/SignUpPage/SignUpComponent.tsx	50.00% <ø> (ø)
src/components/PasswordReset/Request.tsx	83.33% <66.66%> (+83.33%)	⬆️

... and 1 file with indirect coverage changes

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