family_key to use an existing family member, or provide partner details to add them automatically. Report is generated in the background - you will be notified when ready.family_key (e.g. Family-12345). All partner_* fields are ignored.partner_name + partner_dob (both required) plus optional partner_birth_time, partner_birth_place, partner_latitude, partner_longitude, partner_timezone. The partner is auto-added to the family list (relation inferred from the user's gender - M→Wife, F→Husband).200 - returns prediction_key (Match-XXXXX) and a message. Generation runs in the background; poll GET /marriage/report/{prediction_key} and/or wait for the push notification.401 - invalid/expired token404 - family_key does not match any family member of this user409 - a report for this same partner is already pending/processing422 - neither family_key nor partner_name+partner_dob supplied