🎨 Fixes flaky test_studies_dispatcher_studies_access

[pcrespov]

What do these changes do?

This PR aims to remove a recent "flaky" test in master

FAILED tests/unit/with_dbs/01/studies_dispatcher/test_studies_dispatcher_studies_access.py::test_guest_user_is_not_garbage_collected[64] - AssertionError: Expected /study/uuid, got /error?message=We+have+reached+the+maximum+of+anonymous+users+allowed+the+platform.+Please+try+later+or+login+with+a+registered+account.&status_code=429

It enhances error handling and cleanup during creation of guest users in the studies_dispatcher plugin.

Related issue/s

Part of

• list of flaky tests in CI #3421
• Maintenance: integrate _studies_access.py into studies_dispatcher #3977

How to test

Dev Checklist

• No ENV changes or I properly updated ENV (read the instruction)

DevOps Checklist

None

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (a145762) 85.3% compared to head (7b5e7aa) 81.1%.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #5304      +/-   ##
=========================================
- Coverage    85.3%   81.1%    -4.3%     
=========================================
  Files        1316     542     -774     
  Lines       53846   27162   -26684     
  Branches     1173     202     -971     
=========================================
- Hits        45973   22044   -23929     
+ Misses       7623    5068    -2555     
+ Partials      250      50     -200     

Flag	Coverage Δ
integrationtests	65.1% <30.4%> (+<0.1%)	⬆️
unittests	86.5% <65.2%> (+3.5%)	⬆️

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

Files	Coverage Δ
...re_service_webserver/studies_dispatcher/_errors.py	100.0% <100.0%> (ø)
...ce_webserver/studies_dispatcher/_studies_access.py	85.9% <50.0%> (+56.7%)	⬆️
...ore_service_webserver/studies_dispatcher/_users.py	91.3% <63.1%> (+44.2%)	⬆️

... and 955 files with indirect coverage changes

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[jsaq007]

👍