How to sign aab by google key

Hi all, im totally beginner, and I beggin for your help I've already broke my mind.

Im trying to upload and sign APK in Unity, and i get this message : "The Android App Bundle was signed with the wrong key. Please select the correct key and try again. The App Bundle must be signed with a fingerprint certificate"

I found some instruction how to sort it out (see link below). how to generate KEY archive via some Java PEPK command.

"java -jar pepk.jar --keystore=foo.keystore --alias=foo --output=output.zip --signing-keystore=uploadkey.keystore --signing-key-alias=upload-key-alias --encryptionkey=somekey"

The thing is that i cant get some parametrs(signing-keystore, signing-key-alias) for this command to finish that and i have no clu where to find them. My question is how to finish these parametrs and how to finish this command.

BTW if someone knows the easier way how to sort it out id really like to now about it.

kind regard, Anatolii.

https://www.youtube.com/watch?v=noOhXFlucJc![alt text][1]

[1]: /storage/temp/186758-screenshot-2021-09-27-at-192558.png