langkah2

ke sini dulu https://console.developers.google.com/iam-admin/serviceaccounts

trus buat project baru abis itu 'create service account' pas bagian Service account details di sisi bebas pas Grant this service account access to project pilih rolenya Currently used -> owner done , trus ke klik email yg belakangnya iam.gserviceaccount.com trus ke keys -> add key pilih yg .json abis itu ke download

hasil json terdapat client_email -> copy paste pada link folder google drive nah hasil download isinya masukin ke client_secret.json timpa aja

baru dah jalanin