How to disable 2 step verification owncloud

I have the ownCloud 2 step verification setup with google authentication oh my phone but I had to reinstall my phone and had to reinstall the google app now I can't log into my ownCloud without authentication app, how can I access my ownCloud now? Thank you.

I just have done the following query in the search box above:

which showed me the following thread as a second hit: