Add second Teamviewer account to Authy

Goodday,

We use a Teamviewer 12 version with the two factor authentication app Authy. I Have connected my manager account on my phone and my colleque his manager account on his phone. Now i want to grant acces to his account for the next couple of weeks. But i Cant find a way to add a second user to the manage account of my colleque. does anyone know or this is even possible?

Thank you in advance.

Remco