Google Play Store question

Unity Engine
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1

Well met everyone

I have developed a game for another party. They set up their google play account to sell their game. In doing so, they used the default settings for things such as com.defaultuser.somegame and some random key for the app.
I am now getting errors. The one I am stuck on is: “Certificate fingerprint is invalid” when trying to authorize the app.

How do I fix this?
Any help would be appreciated.

2

Random key? How was it generated? And how would you expect to authorize another users app? Who/how did you publish to Google Play? Do you have their user keystore file and password?