It sounds like you are experiencing an issue with Google creating bot accounts that sign in with Google Sign-In on your app, and you want to know if there is a way to opt-out of this or prevent it from happening. Unfortunately, there is no direct way to opt-out of this behavior or prevent it from happening, as these bots are likely automated testing accounts that Google uses to verify the functionality of apps on the Play Store.
However, there are some steps you can take to mitigate the impact of these bot accounts on your app and its users. One option is to implement more robust user verification methods, such as two-factor authentication or email verification, to prevent the bot accounts from registering in the first place. Additionally, you can monitor your app's user activity closely and take action against any suspicious or abusive behavior, including reporting and banning bot accounts as necessary.
Another option is to contact Google support and explain your situation to see if they can provide any assistance or insights into why these bot accounts are being created and how to prevent them. Additionally, you can submit feedback through the Play Console to provide feedback to Google and request changes to their automated testing processes.
Overall, while it may be frustrating to deal with these bot accounts, it is important to remember that they are likely created with the intention of improving the quality and security of the apps on the Play Store. By taking proactive measures to prevent and address their impact, you can ensure that your app remains safe and functional for all of its users.