I use 2-step auth (I really recommend it to anyone who is able, it is far more secure) and it's quite simple to manage. After switching over to 2-step authentication your Kobo will no longer connect to any Google-based services. All you have to do to reconnect your Kobo to your google account is to create an application specific password from your 2-step authentication settings (see the link that Peter posted) and enter that on your Kobo (go to settings > accounts > Google on your Vox).
It's really quite easy.
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