783c0dd52a
The fallback block only runs when EmailFallback || UsernameFallback, so when UsernameFallback is off the else branch (previously an empty-username candidate) is the email-only lookup path: it must still run one GetUserWithEmail to link an existing local user by email. Removing it entirely would skip that lookup and create a duplicate user for the emailfallback-only config. Replace the empty-string sentinel with an explicit []*user.User candidate list built in a small helper, keeping the same behavior, and assert no duplicate is created in the email-only fallback test. |
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