Handle duplicate yandex user registration

[vityaman]

lms-botalka   | Caused by: org.jooq.exception.IntegrityConstraintViolationException: SQL [insert into "lms"."auth_yandex" ("user_id", "yandex_id", "yandex_login") values ($1, $2, $3)]; duplicate key value violates unique constraint "auth_yandex_yandex_id_key"

lms-botalka   | ru.vityaman.lms.botalka.storage.jooq.exception.UniqueViolationException: SQL [insert into "lms"."auth_yandex" ("user_id", "yandex_id", "yandex_login") values ($1, $2, $3)]; duplicate key value violates unique constraint "auth_yandex_yandex_id_key"
lms-botalka   |         at ru.vityaman.lms.botalka.storage.jooq.exception.ConstraintViolationMappingKt$mapping$1.invoke(ConstraintViolationMapping.kt:10) ~[!/:0.0.1]
lms-botalka   |         Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: