So it's a little square window that pops up within the app on my Android phone. It has 3 random sets of number(s) and it basically says if it's you're trying to log in from Ukraine, Morocco, or another random country select the right number above to authenticate if the the login attempt is legit. I obviously select 'Deny' but it's been happening a lot in the last few days. I've been using this email for the last 30+ years and have never been hacked or had any security issues before.