let dataToUpdate = [ "certificationsList" : FieldValue.arrayUnion ( [[ "company": certificate.company, "title" : certificate.title, "startDate" : startDate1, "endDate" : endDate1 ]]) ]
let dataToUpdate = [ "certificationsList" : FieldValue.arrayUnion ( [[ "company": certificate.company, "title" : certificate.title, "startDate" : startDate1, "endDate" : endDate1 ]]) ]