Hi casheleo
Could you please take a look at the 2 following articles?They may assist in your quest for a resolution of the issue at hand.
https://community.teamviewer.com/t5/Knowledge-Base/Security-codes-and-apps-for-two-factor-authentication/ta-p/4615
https://community.teamviewer.com/t5/Knowledge-Base/Two-factor-authentication-Activation-and-Deactivation/ta-p/66
Hope this helps.
Yuhi