Control of the Gmail account and ability to get an oath token for that account are one at the same, as far as I know. Both indicate you’ve authenticated as that

Control of the Gmail account and ability to get an oath token for that account are one at the same, as far as I know. Both indicate you’ve authenticated as that user with Google. There are a few others. I’m not sure it’s worth the special casing, but it can be a better user experience.