Use the following query to export user details from database directly
SELECT CORE.dps_user.id as User_ID, CORE.dps_user.first_name, CORE.dps_user.email, CORE.dps_user.realm_id, CORE.dps_user_org.organization
FROM CORE.dps_user
INNER JOIN CORE.dps_user_org
ON CORE.dps_user.id= CORE.dps_user_org.user_id
ORDER BY CORE.dps_user.realm_id