[SELC-4847] Feat: Added retry in UserRegistry API

[flaminiaScarciofolo]

List of Changes

• Added retry in UserRegistry API

Motivation and Context

Sometimes UserRegistry returnes timeout so we have to use backoff retry for this case.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[sonarqubecloud]

Quality Gate failed

Failed conditions
76.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud