How to sign existing Play Store app built and signed with Animate (AIR) for new App Bundle format.

Google uses the new App Bundle and requires developers to use the same certificate to sign the bundle.

My apps apk was always signed with a temperary (.p12) certificate generated in Animate.

I've used keytool to convert the p12 to JKS format

      keytool -v -importkeystore -srckeystore "TempCert2016.p12" -srcstoretype PKCS12 -destkeystore         TempCert2016.jks -deststoretype JKS

Now I should be able to use PEPK.jar supplied by google to make a PEM

    java -jar pepk.jar --keystore=TempCert2016.jks --alias=foo --output=TempCert2016.pem --encryptionkey=<KEY>

The problem I'm having is, what was the alias for the temporary p12 certificate generated by Animate in 2016?  Or maybe versions before that?