App Inventor Where to write the keytool command

[Mercede]

Where to write the keytool command
Hallo friends
I finished my App using Mit App Inventor and ready to load to Google Play.
To do that I run Generete Sign Bundle into "Anroid Studio" ad obtained the file app-release.aab.
Sent to google Play I got error becouse of the SHA1... key in GPlay do not mutch with mine.
After contact GPlay support I got following answer:

generate a new key:
keytool -genkeypair -alias upload -keyalg RSA -keysize 2048 -validity 9125 -keystore keystore.jks
then: Export the certificate for that key to PEM format:
keytool -export -rfc -alias upload -file upload_certificate.pem -keystore keystore.jks

But as far as for me Android Studio is really new, I do not know where to place such command line and activate.
Any help will be appreciated
thanksfor your patienze
Mercede