How to restore/recover accidentally deleted key from google Authenticator? Is there any way to recover my accidentally deleted key from google authenticator app ? My android device is not rooted and am not able to access the 'com.google.android.apps.authenticator2' package. I have already tried adb pull/ adb backup but it is not usefull for non rooted device. Is there any way I can access to the database folder without root or rooting is the only option. Also I am not sure key will be there on the DB if I have manually deleted the key. Can anyone confirm. 

Thanks in advance.
By deletion of key, if you mean to say that you've deleted your account from Google authenticator app, you'll not be able to recover it by adb systems.

Simply go to Google my account, log in, and if it asks for authenticator pass code, choose a different methods of verification, and then either backup codes or through mobile verification (whichever you've got active). Then switch off authenticator system of verification. Again switch it on, and follow on-screen processes. Done. This is the simplest method to regain authenticator access.