My guess is 2fa code apps. Why you ask? Because blizzard already did it. They use their own proprietary 2fa code generator app called battle net, so I have to use it. So after a few months/years of casually not using anything remotely connected with Mr. And Mrs. „Muttermilchknacker”

explanation

(A word derived from the „Panzerknacker” series of comics where the same named group of idiotic bandits try to break open a gold vault full of money, which I use since the scandal where someone stole the lactation bottle of someone working at Activision)

, I finally decided to try Overwatch 2 again, and when I tried to use my login app to confirm my login, I found myself logged out. And when I tried to log in again, I had to use the Authenticator, which I was logged out of, to use my authenticator, in order to log into the authenticator, in order to use the authenticator, in order to log into my authenticator (I could keep going like this forever)