I am trying to export my project as an apk for the Google play store. My initial attempt using 'Godot 3.0.6-stable' to upload my exported apk file was unsuccessful. Google Play console indicated that the apk was signed in debug mode and needed to be signed as release mode instead. However, I was unable to do this successfully in Godot as I got the error 'Could not find keystore, unable to export'. I have also downgraded to 'Godot 3.0.4-stable' and the same error persists. Is there something I am missing or a work around for this?