Zsul 2) Have you tried enabling calls and SMS access to User 2?
This should work:
Settings > System > Users > User 2 > (temporarily) Turn on phone calls and SMS
Or alternatively, this might work aswell:
Settings > System > Users > User 2 > (temporarily) Allow running in the background. Then switch to owner to read the SMS verification code and note it down, return to user 2 and input manually (if possible).