fix: only return one result set for credentials_identifier

[aeneasr]

Closes #3105

Related issue(s)

Checklist

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  introduces a new feature.
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Further Comments

[aeneasr]

Kinda hacky, but since credentials_identifier has a unique constraint, this is probably acceptable. The pop query builder doesn't support SELECT DISTINCT right now.

[codecov]

Codecov Report

Merging #3107 (59c0a40) into master (1193a56) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 59c0a40 differs from pull request most recent head 2659765. Consider uploading reports for the commit 2659765 to get more accurate results

@@            Coverage Diff             @@
##           master    #3107      +/-   ##
==========================================
- Coverage   77.56%   77.55%   -0.01%     
==========================================
  Files         315      315              
  Lines       19949    19962      +13     
==========================================
+ Hits        15473    15482       +9     
- Misses       3285     3288       +3     
- Partials     1191     1192       +1     

Impacted Files	Coverage Δ
identity/test/pool.go	100.00% <100.00%> (ø)
persistence/sql/persister_identity.go	74.74% <100.00%> (+0.12%)	⬆️
session/test/persistence.go	99.05% <0.00%> (-0.95%)	⬇️

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[jonas-jonas]

Yep, kinda hacky fits :D

But if it works :)