Invoke-WebRequest https://www.greek-language.gr/certification/results/index.html -Method POST -Headers @{ 'Content-Type' = 'application/x-www-form-urlencoded' }  -Body @{'inputCenterCode' = '35703'; 'inputCandidateCode' = '1234'; 'inputCandidateSurname' = 'PUPKIN' } | Select-Object -ExpandProperty Content