in service/src/main/java/org/apache/fineract/cn/interoperation/service/internal/service/InteropService.java [114:128]
public InteropIdentifierData registerAccountIdentifier(@NotNull InteropIdentifierCommand request) {
//TODO: error handling
String accountId = request.getAccountId();
validateAndGetAccount(accountId);
String createdBy = getLoginUser();
LocalDateTime createdOn = getNow();
InteropIdentifierEntity identifier = new InteropIdentifierEntity(accountId, request.getIdType(), request.getIdValue(),
request.getSubIdOrType(), createdBy, createdOn);
identifierRepository.save(identifier);
return new InteropIdentifierData(accountId);
}