Nintendo’s Pok..mon GO app granted full account access to your Google account when you sign into the app via Google on iPhone or iPad. Developer Niantic, who is behind the game, said that it never intended for its game to get full access to users Google accounts. Pok..mon GO can now see and modify nearly all information in your Google Account (but it can’t change your password, delete your account, or pay with Google Wallet on your behalf) Users can revoke Pok..mon GO’s access to their Google account.
Source: https://thehackernews.com/2016/07/uh-oh-pokemon-go-grants-itself-full.html