How do I restrict my email accounts from being used to login to Google Antigravity?

I will say it upfront, I am not into software development or anything technical like that. I do not use google antigravity. My brother does. And I want to restrict my account from being used to log into the Antigravity app. The app is installed on my pc. And the login system let’s the app and the user use the default browser to pick any emails I am logged into. No verification process, no authentication process, no asking me about the login on my phone. I do not want my emails to be used for this. But there everything I tried only removed the current login from the app but not further usage of my account.
Is there any way to completely restrict my email from this particular application?

Shouldn’t your brother have and use their own OS account? This seems out of scope.

Cheers.

Hi @temp_user9318,

Welcome to the Forum,

While separate computer accounts are technically ideal, shared PCs are very common, so I want to help you resolve this directly.

Personal Google accounts (@gmail.com) unfortunately do not have a feature to permanently “blocklist” a specific application. Antigravity was able to log in without a phone prompt simply because your default web browser already had an active, trusted Google session for your account.

To stop this completely, please follow these two steps:

  1. Revoke App Permissions Online: Go to your Google Account connections page at myaccount.google.com/connections. Find Antigravity in the list, click on it and select Delete all connections.
  2. Sign Out Locally: Open the Antigravity 2.0, open Settings (typically in the bottom-left corner), and explicitly click Account > Sign Out to clear any cached login tokens on the machine.

To prevent your brother from accidentally selecting or signing into your email again, we recommend creating a separate browser profile for him in your web browser (via the profile icon at the top-right of Chrome or Edge).