I have alway an opened terminal in front of my eyes, rarely my phone, so I found helpful to retrieve my OTP pin with a bash command
# yum install oathtool
the secret can be find in the home of your user:
$ cat ~/.2fa.secret
then you can create a bash file with this, think to chmod 700 <file>
#/usr/bin/bash
/usr/bin/oathtool --totp <hexKey>