SELECT
    c.id,
    u.name AS userName,
    CONCAT(w.lastName, ' ', w.firstName) salesPersonName,
    w.phone AS salesPersonPhone,
    CONCAT(wu.name, '@verdnatura.es') AS salesPersonEmail
FROM client c
    JOIN account.user u ON u.id = c.id
    LEFT JOIN worker w ON w.id = c.salesPersonFk
    LEFT JOIN account.user wu ON wu.id = w.userFk
WHERE c.id = ?