1. Key file is the private key which you have downloaded when you have created the project
2. cert is the cert.pem file which is your project certificate
3. ca is the Digicert Root CA which you download from the Common Certificate link on Credentials tab. Please make sure you download it from the link provided there and it has an extension of .cer and not .crt
Was your question answered? Don't forget to click on "Accept as Solution" to help other devs find the answer to the same question.