I hasn't seen anyone post this, so please be aware of the current security issue.
Mostly for iPhone/iPad users.
When signing up with Google, you apparently gave the company full-access to you google account. They can pretty much access everything related to that account in Google. So Drives, Documents, Emails, etc. You can remove the access/permission, but some people say that it makes you restart. However, some people say they were able to continue.
If you revoked the access, let us know what happened. Did you restart, or were you able to to continue?
I used an old gaming email from Gmail that has no personal information and I saw that PokemonGo does have full-access. Since I have nothing to worry about, I'm not that concerned, but I also don't want to risk my progress now anyways, so I'm not risking revoking it. Apparently the company is aware of it and called it an apparent glitch, so users are expecting a fix to it soon.
Other than that, I did join a PokemonGO discord chat, if anyone would like an invite, just ask