We should create a new UniqueFieldUserEvent event that will be dispatched when the validation for users has failed. We should pass the field name and submitted value to the event as arguments.
i.e., after adding a new error $form_state->setErrorByName()

Issue fork unique_field-3570258

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astonvictor created an issue. See original summary.

shubham_pareek_19 made their first commit to this issue’s fork.

shubham_pareek_19 opened merge request !29

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shubham_pareek_19 commented
Status: Active » Needs review
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boddy commented
Assigned: Unassigned » boddy
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boddy commented
Assigned: boddy » Unassigned
Status: Needs review » Reviewed & tested by the community

Fixed merge conflicts.

Created an additional field 'field_text', set Unique Field restrictions for it in User.
Edited the existing user's field, tried to add the second one with the same value.
The UniqueFieldUserEvent event was dispatched successfully.

RTBC

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astonvictor commented
Status: Reviewed & tested by the community » Needs work

merge conflicts

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astonvictor commented
Status: Needs work » Fixed

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Status: Fixed » Closed (fixed)

Automatically closed - issue fixed for 2 weeks with no activity.