This App is blocked error while extracting lifetime refresh token using OAuth Playground to supply to Azure Google Adwords linked service connector

While authorizing my Google Ads Account using OAuth Playground to retrieve a lifetime refresh token which could used to further create access tokens, the authorization is throwing This app is blocked security error. I think this is because the GCP OAuth consent screen is not verified. But how do I verify my OAuth consent screen when I don't have an App domain name, since I'm using this as a one time activity to retrieve my refresh token using OAuth Playground?